G32AA430VDDC1224

Solid State Relays G3PA Refer to Warranty and Application Considerations (page 1), Safety Precautions (page 4), and Technical and Safety Information (page 6). Extremely Thin Relays Integrated with Heat Sinks • Downsizing achieved through optimum design of heat sink. • Mounting possible via screws or via DIN track. • Close mounting possible for linking terminals. (Except for G3PA-260B-VD and G3PA-450B-VD-2.) • Applicable with 3-phase loads. • Replaceable power element cartridges. • Comply with VDE 0160 (finger protection), with a dielectric strength of 4,000 V between input and load. • Comply with VDE 0805, IEC 950. • Certified by UL, CSA, and VDE (reinforced insulation). Model Number Structure ■ Model Number Legend G3PA-@@@@-@-@ 1 2 3 4 5 6 7 1. Basic Model Name G3PA: Solid State Relay 2. Rated Load Power Supply Voltage 2: 200 VAC 4: 400 VAC 3. Rated Load Current 10: 10 A 20: 20 A 30: 30 A 40: 40 A 50: 50 A 60: 60 A 4. Terminal Type B: Screw terminals 5. Zero Cross Function Blank: Equipped with zero cross function L: Not equipped with zero cross function 6. Certification VD: Certified by UL, CSA, and VDE 7. Special Specifications Blank: Standard models 2: 480-V models 166 Solid State Relays G3PA Ordering Information ■ List of Models Model Isolation G3PA-210B-VD Phototriac coupler G3PA-220B-VD Zero cross function Yes Indicator Yes Rated output load 10 A at 24 to 240 VAC Rated input voltage 5 to 24 VDC 20 A at 24 to 240 VAC G3PA-240B-VD 40 A at 24 to 240 VAC G3PA-260B-VD 60 A at 24 to 240 VAC G3PA-210BL-VD No 10 A at 24 to 240 VAC G3PA-220BL-VD 20 A at 24 to 240 VAC G3PA-240BL-VD 40 A at 24 to 240 VAC G3PA-260BL-VD 60 A at 24 to 240 VAC G3PA-210B-VD Yes 10 A at 24 to 240 VAC G3PA-220B-VD 20 A at 24 to 240 VAC G3PA-240B-VD 40 A at 24 to 240 VAC G3PA-260B-VD 60 A at 24 to 240 VAC G3PA-420B-VD 20 A at 180 to 400 VAC G3PA-430B-VD 30 A at 180 to 400 VAC G3PA-420B-VD-2 20 A at 200 to 480 VAC G3PA-430B-VD-2 30 A at 200 to 480 VAC G3PA-450B-VD-2 50 A at 200 to 480 VAC 24 VAC 12 to 24 VDC Note: When ordering, specify the rated input voltage. Replacement Parts Name Carry current Power Device Cartridge 10 A Load voltage range 19 to 264 VAC 20 A 40 A 60 A 20 A 150 to 440 VAC 30 A 20 A 180 to 528 VAC Model Applicable SSR G32A-A10-VD DC5-24 G3PA-210B-VD DC5-24 G32A-A10L-VD DC5-24 G3PA-210BL-VD DC5-24 G32A-A10-VD AC24 G3PA-210B-VD AC24 G32A-A20-VD DC5-24 G3PA-220B-VD DC5-24 G32A-A20L-VD DC5-24 G3PA-220BL-VD DC5-24 G32A-A20-VD AC24 G3PA-220B-VD AC24 G32A-A40-VD DC5-24 G3PA-240B-VD DC5-24 G32A-A40L-VD DC5-24 G3PA-240BL-VD DC5-24 G32A-A40-VD AC24 G3PA-240B-VD AC24 G32A-A60-VD DC5-24 G3PA-260B-VD DC5-24 G32A-A60L-VD DC5-24 G3PA-260BL-VD DC5-24 G32A-A60-VD AC24 G3PA-260B-VD AC24 G32A-A420-VD DC12-24 G3PA-420B-VD DC12-24 G32A-A430-VD DC12-24 G3PA-430B-VD DC12-24 G32A-A420-VD-2 DC12-24 G3PA-420B-VD-2 DC12-24 30 A G32A-A430-VD-2 DC12-24 G3PA-430B-VD-2 DC12-24 50 A G32A-A450-VD-2 DC12-24 G3PA-450B-VD-2 DC12-24 VDE certification Yes ■ Other Units (Order Separately) Units that Enable 2-line Switching of 3-phase Power Name Short-circuit Unit Current flow 10 A Model G32A-D20 20 A 30 A 40 A Applicable SSR G3PA-210B-VD, G3PA-210BL-VD G3PA-220B-VD, G3PA-220BL-VD G3PA-420B-VD, G3PA-420B-VD-2 G32A-D40 G3PA-430B-VD, G3PA-430B-VD-2 G3PA-240B-VD, G3PA-240BL-VD Solid State Relays G3PA 167 Specifications ■ Ratings (at an Ambient Temperature of 25°C) Input Model G3PA-210B-VD Rated voltage Operating Voltage range Input current impedance Voltage level Must operate voltage Must release voltage 5 to 24 VDC 4 to 30 VDC 7 mA max. 4 VDC max. 1 VDC min. 5 to 24 VDC 4 to 30 VDC 20 mA max. 4 VDC max. 1 VDC min. 24 VAC 19.2 to 26.4 VAC 1.4 kΩ±20% 19.2 VAC max. 4.8 VAC min. 12 to 24 VDC 9.6 to 30 VDC 7 mA max. 9.2 VDC max. 1 VDC min. G3PA-220B-VD G3PA-240B-VD G3PA-260B-VD G3PA-210BL-VD G3PA-220BL-VD G3PA-240BL-VD G3PA-260BL-VD G3PA-210B-VD G3PA-220B-VD G3PA-240B-VD G3PA-260B-VD G3PA-420B-VD G3PA-430B-VD G3PA-420B-VD-2 G3PA-430B-VD-2 G3PA-450B-VD-2 Output Model Applicable load Rated load voltage G3PA-210B(L)-VD 24 to 240 VAC (50/60 Hz) Load voltage range 19 to 264 VAC (50/60 Hz) Load current Inrush current 0.1 to 10 A 150 A (60 Hz, 1 cycle) G3PA-220B(L)-VD 0.1 to 20 A 220 A (60 Hz, 1 cycle) G3PA-240B(L)-VD 0.5 to 40 A 440 A (60 Hz, 1 cycle) G3PA-260B(L)-VD 0.5 to 60 A 440 A (60 Hz, 1 cycle) 220 A (60 Hz, 1 cycle) G3PA-420B-VD 180 to 400 VAC (50/60 Hz) 150 to 440 VAC (50/60 Hz) 0.5 to 20 A 0.5 to 30 A 440 A (60 Hz, 1 cycle) 200 to 480 VAC (50/60 Hz) 180 to 528 VAC (50/60 Hz) 0.5 to 20 A 220 A (60 Hz, 1 cycle) G3PA-430B-VD-2 0.5 to 30 A 440 A (60 Hz, 1 cycle) G3PA-450B-VD-2 0.5 to 50 A 440 A (60 Hz, 1 cycle) G3PA-430B-VD G3PA-420B-VD-2 Refer to Engineering Data for further details. 168 Solid State Relays G3PA ■ Characteristics Item G3PA210B(L)-VD G3PA220B(L)-VD G3PA240B(L)-VD G3PA260B(L)-VD G3PA420B-VD G3PA420B-VD-2 G3PA430B-VD G3PA430B-VD-2 G3PA450B-VD-2 Operate time 1/2 of load power source cycle + 1 ms max. (DC Input, -B models) 1 1/2 of load power source cycle + 1 ms max. (AC Input) 1 ms max. (-BL models) Release time 1/2 of load power source cycle + 1 ms max. (DC Input) 1 1/2 of load power source cycle + 1 ms max. (AC Input) Output ON voltage drop 1.6 V (RMS) max. Leakage current 5 mA max. (at 100 VAC) 10 mA max. (at 200 VAC) 10 mA max. (at 100 VAC) 20 mA max. (at 200 VAC) 20 mA max. (at 400 VAC) 20 mA max. (at 20 mA 480 VAC) max. (at 400 VAC) I 2t 260 A2s 1,260 A2s 260 A2s 1,800 A2s Insulation resistance 100 MΩ min. (at 500 VDC) Dielectric strength 4,000 VAC, 50/60 Hz for 1 min Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.375–mm single amplitude (Mounted to DIN track) Shock resistance Destruction: 300 m/s2 (mounted to DIN track) Ambient temperature Operating: –30°C to 80°C (with no icing or condensation) Storage: –30°C to 100°C (with no icing or condensation) Certified standards UL508, CSA C22.2 (No.14, No.950), EN60950 File No. 5915ÜG Ambient humidity Operating: 45% to 85% Weight Approx. 260 g Approx. 340 g 1.8 V (RMS) max. Approx. 460 g Approx. 900 g 20 mA max. (at 480 VAC) 1,800 A2s 1,800 A2s UL508, CSA C22.2 (No.14), EN609474-3 File No. 6642ÜG UL508, CSA C22.2 (No.14), EN60947-4-3 File No. 133127ÜG UL508, CSA C22.2 (No.14), UL508, EN60947-4-3 File No. CSA 133127ÜG C22.2 (No.14), EN609474-3 File No. 6642ÜG Approx. 290 g Approx. 290 g Approx. 410 g Approx. 410 g Solid State Relays Approx. 900 g G3PA 169 Operation ■ Replacement Parts G32A-A Power Device Cartridge The G32A-A Power Device Cartridge (a Triac Unit) can be replaced with a new one. When the temperature indicator has changed from pink to red, the triac circuitry may have malfunctioned possibly by an excessive flow of current, in which case, dismount the damaged cartridge for replacement. The damaged cartridge can be replaced with a new one without disconnecting the wires from the G3PA. Improve the heat radiation efficiency of the G3PA before replacing the cartridge. The G32A-A Power Device Cartridge can withstand an excessive current for a short period of time, such as may be caused accidentally by the short circuitry of the load, in which case the temperature indicator will not turn red. Be sure to turn OFF the power supply when replacing the Cartridge. Supplying power with the Cartridge removed may result in malfunction. Appearance G32A-A10(L)-VD G32A-A20(L)-VD G32A-A420-VD(-2) G32A-A40(L)-VD G32A-A430-VD(-2) G32A-A60(L)-VD G32A-A450-VD-2 Replacing Power Device Cartridges When replacing Power Device Cartridges, use the specified model. Using a Power Device Cartridge other than the specified one will result in faulty operation and destruction of the elements. 170 Solid State Relays G3PA ■ Replacement Procedure G32A-A10(L)-VD/G32A-A20(L)-VD/G32-A420-VD(-2) Use the special tool (provided) to extract the cartridge for replacement with a new one. Extraction Follow the procedures below to dismount the Power Device Cartridge from the G3PA. 1. Switch off the power. 2. Remove the terminal cover. 3. Hook the indented part of the cartridge with the tool and pull up on the cartridge to remove it. Remover Hook here with Remover. Apply silicone grease here. 2. Make sure that there is no dust or pieces of wire on the heat sink of the G32A-A or the G3PA. 3. Insert the cartridge into the opening of the G3PA so that the letters on the cartridge and those on the G3PA are in the same direction and side A and side B are even. Side A Side B Mounting Follow the procedures below to mount the Power Device Cartridge on the G3PA. 1. Apply silicone grease (provided with the G32A-A) to the entire surface of the heat sink. 4. Attach the terminal cover. 5. Switch on the power and check the G3PA to be sure it works properly. G32A-A40(L)-VD/G32A-A60(L)-VD/G32A-A430-VD(-2)/G32A-A450-VD-2 The G32A Power Device Cartridge is mounted and secured with screws to the G3PA Unit. Extraction Mounting Follow the procedures below to dismount the G32A-A Power Device Cartridge from the G3PA. 1. Apply silicone grease to the entire surface of the heat sink. 1. Switch off the power. 2. Remove the terminal cover. 3. Loosen the two centered screws on the sides to dismount the cartridge. The screws are connected to terminals 1 and 2. Apply silicone grease here. Loosen 2. Make sure that there is no dust or pieces of wire on the heat sink of the G32A-A or the G3PA. Loosen 4. Loosen the screws on both the corners. Loosen Loosen 5. Hold the indented part of both the corners to dismount the cartridge. Solid State Relays G3PA 171 3. Insert the cartridge into the opening of the G3PA so that side A and side B are even. Side A 4. Tighten the screws on both the corners with a tightening torque of 0.59 to 0.78 N·m. 5. Tighten the screws on both the sides with a tightening torque of 0.59 to 0.78 N·m. 6. Attach the terminal cover. 7. Switch on the power and check the G3PA to be sure it works properly. Side B ■ Linking Terminal Connection • Connecting with linking terminal for G3PA-210B(L)-VD, -220B(L)VD, -240B(L)-VD and G3PA-420B-VD(-2), G3PA-430B-VD(-2). • Connecting with linking terminal for G32A. SSR SSR1 SSR2 SSR1 G32A Unit SSR G32A Unit SSR2 * * The cover will not fit if the terminal protrudes. 1. When SSRs are close mounted, loosen the M3.5 Sems screw and flip the linking terminal down. 2. Insert the linking terminal securely into the center of the screw and tighten the screw. 1. When SSR are close mounted, loosen the M3.5 Sems screw on the G32A and flip the linking terminal down. 2. Insert the linking terminal securely into the center of the screw and tighten the screw. Ensure that the linking terminal does not protrude. Connect the terminal with power off. Linking terminal G3PA-420B-VD Refer to the instruction manual for the G32A-A Power Device Cartridge to replace the G3PA's triac part. Linking terminal When the temperature indicator has turned from pink to red, the G32-A-A Power Device Cartridge may have malfunctioned, in which case the cartridge must be replaced with a new one. 172 Solid State Relays G3PA Linking terminal Linking terminal Use the terminal cover to prevent accidents due to electric shock. Engineering Data Load Current vs. Ambient Temperature Vertical Mounting Panel Ground G3PA-210B(L)-VD, G3PA-220B(L)-VD G3PA-240B(L)-VD G3PA-260B(L)-VD G3PA-220B(L)-VD 80 15 Load current (A) G3PA-210B(L)-VD Load current (A) Load current (A) 25 60 40 25 20 -30 -20 Ambient temperature (°C) Ambient temperature (°C) Ambient temperature (°C) 20 40 60 80 100 G3PA-450B-VD-2 Load current (A) G3PA-430B-VD, G3PA-430B-VD-2 Load current (A) Load current (A) G3PA-420B-VD, G3PA-420B-VD-2 0 Ambient temperature (°C) Ambient temperature (°C) Ambient temperature (°C) Note: Close mounting is possible for a maximum of three Units by reducing the load current by 20%. (A minimum clearance of 10 mm must be provided when mounting four or more Units.) Solid State Relays G3PA 173 Input Voltage vs. Input Current G3PA-4@0-VD, G3PA-4@-VD-2 Input impedance (kΩ) Input current (mA) Input impedance (kΩ) Input current (mA) G3PA-2@0B-VD Ta = 25°C 8 6 4 Input current 2 1 0.8 0.6 Input impedance 10 Input current 4 2 Input impedance 1 0.8 0.6 0.4 0.4 0.2 0.2 0.1 1 T = 25°C 8 6 0.1 2 4 6 8 10 20 1 40 2 4 6 8 10 20 40 Input voltage (V) Input voltage (V) Horizontal Mounting Panel Ground G3PA-220B(L)-VD 15 14 11 10 G3PA-210B(L)-VD 7 5.5 5 3.5 G3PA-260B(L)-VD Load current (A) 20 G3PA-240B(L)-VD Load current (A) Load current (A) G3PA-210B(L)-VD, G3PA-220B(L)-VD 28 11 10 60 42 40 20 18 −30 −20 Ambient temperature (°C) Ambient temperature (°C) G3PA-430B-VD G3PA-420B-VD Ambient temperature (°C) 174 Solid State Relays G3PA G3PA-450B-VD-2 Load current (A) Load current (A) G3PA-420B-VD, G3PA-430B-VD G3PA-420B -VD-2, G3PA-430B-VD-2 Ambient temperature (°C) 0 20 40 60 80 Ambient temperature (°C) 100 Close Mounting (Up to Three) Panel Ground DIN track G3PA-210B(L)-VD, G3PA-220B(L)-VD G3PA-240B(L)-VD G3PA-260B(L)-VD 30 45 27 G3PA-220B-VD 15 13 9 G3PA-210B-VD 7 5 4.5 64 36 Load current (A) 20 18 Load current (A) Load current (A) 40 30 20 14 48 40 20 10 -30 -20 Ambient temperature (°C) Ambient temperature (°C) G3PA-420B-VD, G3PA-420B-VD-2 20 40 60 80 100 G3PA-430B-VD, G3PA-430B-VD-2 30 40 Load current (A) Load current (A) 0 Ambient temperature (°C) 20 16 10 30 24 20 10 −30 10 30 80 Ambient temperature (°C) 100 −30 10 30 80 Ambient temperature (°C) Load current (A) G3PA-450B-VD-2 Ambient temperature (°C) Solid State Relays G3PA 175 One Cycle Surge Current: Non-repetitive Note: Keep the inrush current to half the rated value if it occurs repetitively. Energized time (ms) 176 Solid State Relays G3PA G3PA-240B(L)-VD/260B(L)-VD, G3PA-430B-VD, G3PA-430B-VD-2, G3PA-450B-VD-2 Inrush current (A. Peak) G3PA-220B(L)-VD, G3PA-420B-VD, G3PA-420B-VD-2 Inrush current (A. Peak) Inrush current (A. Peak) G3PA-210B(L)-VD Energized time (ms) Energized time (ms) Dimensions Note: All units are in millimeters unless otherwise indicated. G3PA-210B(L)-VD With Terminal Cover Without Terminal Cover 4.6 dia. Two, M4 Linking terminal B1 Mounting Holes Terminal Arrangement/ Internal Connections Two, 4.5 dia. or M4 holes Input circuit Trigger circuit Two, M3.5 Linking terminal B2 4.6 x 5.6 elliptical hole 100 max. G3PA-220B(L)-VD Without Terminal Cover With Terminal Cover 4.6 dia. Linking terminal B1 Mounting Holes Two, M4 Terminal Arrangement/ Internal Connections Two, 4.5 dia. or M4 holes Input circuit Trigger circuit Two, M3.5 Linking terminal B2 4.6 x 5.6 elliptical hole 100 max. Linking terminal B1 With Terminal Cover 4.6 dia. Two, M5 Mounting Holes Two, 4.5 dia. or M4 holes Two, M3.5 Terminal Arrangement/ Internal Connections Input circuit Without Terminal Cover Trigger circuit G3PA-240B(L)-VD Linking terminal B2 4.6 x 5.6 elliptical hole 100 max. Solid State Relays G3PA 177 G3PA-260B(L)-VD G3PA-450B-VD-2 With Terminal Cover Without Terminal Cover Terminal Arrangement/ Internal Connections Mounting Holes 4.6 dia. Two, M5 Two, M3.5 4.6 x 5.6 elliptical hole Input circuit Trigger circuit Two, 4.5 dia. or M4 holes 110 max. 100 max. G3PA-420B-VD, G3PA-420B-VD-2 Without Terminal Cover With Terminal Cover Mounting Holes Two, 4.5 dia. or M4 4.6 dia. Terminal Arrangement/ Internal Connections Two, M4 7.6 Linking terminal −B2 90±0.3 80 Trigger circuit 38 100 max. Input circuit 90±0.2 Linking terminal 67+B1 8.6 Two, M3.5 2.2 8.8 25±0.2 4.5 x 5.6 elliptic hole 100 max. 37 max. 4.5 13.2 91 90 G3PA-430B-VD, G3PA-430B-VD-2 Without Terminal Cover With Terminal Cover Mounting Holes Terminal Arrangement/ Internal Connections 4.6 dia. Two, M5 Two, 4.5 dia. or M4 Linking terminal +B1 38 100 90±0.2 80 max. Linking terminal −B2 90±0.3 13 18 13 4.6 x 5.6 elliptic hole 89 178 Solid State Relays G3PA 35±0.2 4.5 100 max. 47 max. 91 35±0.3 Input circuit 67 Trigger circuit 7.6 Safety Precautions ■ Precautions for Correct Use Load Please observe the following precautions to prevent failure to operate, malfunction, or undesirable effect on product performance. Load Connection Load power supply SSR Input When attaching a heat sink to the G3PA-(VD), in order to facilitate heat dissipation, apply silicone grease or equivalent heat-conductive grease on the heat sink. (Toshiba Silicone, Shinetsu Silicone, etc.) For an AC load, use a power supply rated at 50 or 60 Hz. The maximum operating frequency is 10 Hz. The G3PA-(VD) has a built-in varistor for overvoltage protection. Tighten the mounting screws of the heat sink with a torque of 0.78 to 0.98 N·m. At a low applied voltage, such as 24 VAC, the load current is not fully supplied. When the Unit is switched ON, the voltage required to power the Unit deprives the output signal of the necessary voltage level and thus creates loss time. The lower the load voltage is, the greater the loss time is. This condition, however, will not create any serious problems. Noise Terminal Voltage according to EN55011 The G3PA-(VD) complies with EN55011 standards when a capacitor is connected to the load power supply as shown in the following circuit diagram. Load Input G3PA-(VD) Output Loss time Recommended Capacitor: 1 µF, 250 VAC For a DC or L load, a diode should be connected in parallel the load to absorb the counter electromotive force of the load. Mounting Vertical ↔ • Screw or DIN track mounting is possible. • Vertical mounting should usually be used. Vertical mounting DIN track G3PA 80 mm DIN track Close mounting Horizontal mounting Vertical G3PA ↔ The rated ambient temperature is 40°C. (30°C for 400 V.) Vertical ↔ Panel Panel • Close mounting is also possible. • Close mounting is possible for up to 3 G3PA SSRs. (If there are 4 or more SSRs, mount at intervals of 10 mm min.) Reduce the load current by 10% for G3PA-210B-VD, -220B-VD, -240B-VD and by 20% for G3PA-260B-VD, 420B-VD(-2), -430B-VD(-2), -450B-VD-2. • Leave a distance of 80 mm • With vertical mounting, reduce the load current by 30%. (Refer to the Load Current vs. Ambient Temperature graph.) Note: Leave a distance of 60 mm min. between SSRs and ducts (especially above the SSR). Solid State Relays G3PA 179 Close Mounting A heat exchanger, if used, should be located in front of the SSR Units to ensure the efficiency of the heat exchanger. SSR Mounting Pitch Please reduce the ambient temperature of SSRs. Panel Mounting (At a rated ambient temperature of 40°C). The rated load current of an SSR is measured at an ambient temperature of 25 or 40 °C. Duct or airflow obstruction SSR An SSR uses a semiconductor in the output element. This causes the temperature inside the control panel to increase due to heating resulting from the passage of electrical current through the load. To restrict heating, attach a fan to the ventilation outlet or air inlet of the control panel to ventilate the panel. This will reduce the ambient temperature of the SSRs and thus increase reliability. (Generally, each 10 °C reduction in temperature will double the expected life.) 60 mm min. Between duct or airflow obstruction and SSR Mounting direction Vertical direction Load current (A) 30 mm min. 80 mm min. Space between SSRs 10 A Required number of fans 0.16 per SSR 20 A 0.31 30 A 0.47 40 A 0.62 60 A 0.93 Example: For 10 SSRs with load currents of 20 A, 0.31 x 10 = 3.1 Thus, 4 fans would be required. Close Mounting min. Size of fans: 92 mm2, Air volume: 0.7 m3/min, Ambient temperature of control panel: 30 °C If there are other instruments that generate heat in the control panel other than SSRs, additional ventilation will be required. Relationship between SSRs and Ducts Countermeasure (1) Duct Height Countermeasure (2) 50 mm max. Vertical direction (A height of no more than half the SSR's height is recommended.) G3PA G3PA Mounting surface G3PA Mounting surface Mounting surface Duct or airflow obstruction Airflow Duct or airflow obstruction Do not surround the SSR with ducts, otherwise the heat radiation of the SSR will be adversely affected. Use short ducts. If the ducts cannot be shortened, place the SSR on a metal base so that it is not surrounded by the ducts. Ventilation Be aware of air flow Duct or air flow obstruction Ventilation outlet G3PA G3PA G3PA Air inlet If the air inlet or air outlet has a filter, clean the filter regularly to prevent it from clogging and ensure an efficient flow of air. Do not locate any objects around the air inlet or air outlet, otherwise the objects may obstruct the proper ventilation of the control panel. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. Cat. No. K094-E1-06 180 In the interest of product improvement, specifications are subject to change without notice. Solid State Relays G3PA