GFR Series - 1 Pole+N, C Trip, 10 mA
277V AC Ground Fault Relay
with Overload Protection (RCBO)
The GFR Series is a combined Equipment Ground Fault Relay and
Supplementary Protector (RCBO), featuring dual pole switching (live
and neutral) and designed to provide protection against overloads and
AC ground faults (residual current faults) as well as pulsating DC
ground faults.
Rated
Current
5.0A
6.0A
8.0A
10A
12A
13A
15A
16A
20A
25A
Type/
Cat. No.
GFR2C05010
GFR2C06010
GFR2C08010
GFR2C10010
GFR2C12010
GFR2C13010
GFR2C15010
GFR2C16010
GFR2C20010
GFR2C25010
Rated
Voltage
277V AC
277V AC
277V AC
277V AC
277V AC
277V AC
277V AC
277V AC
277V AC
277V AC
Ground Fault Sensing
& Relaying Equipment
E483493
GFL Series RCBO
Overload Trip Curves
Electrical Life
Mechanical Life
Dimensions
3600
2400
1+N
277V AC
10 mA
10 kA
50/60Hz
C
Stranded Wire: 16 - 3 AWG (1.5 mm2 - 25 mm2) @ 17.5 lb-in (2.0 Nm)
16 - 10 AWG (1.5 mm2 - 5.5 mm2) @ 17.5 lb-in (2.0 Nm)
Solid Wire:
18 - 16 AWG (1 mm2 - 1.5 mm2) @ 25 lb-in (2.8 Nm)
6000 Switching Operations
10000 Switching Operations
1200
600
480
360
240
120
t(s)
60
40
20
10
time
Number of Poles
Voltage Rating (maximum)
Ground Fault Sensitivity Level
Short Circuit Withstand Rating
Rated Frequency
Trip Characteristic
Cable Size & Tightening Torque
Characteristics B, C, D
7200
Technical Specification
5
Switch
UL 1077
Ground Fault Relay
with Overload Protection
Ordering Information
(to convert to inches multply by 0.03937)
1
85mm
0.5
45mm
35 mm
C
B
0.1
D
0.05
71mm
60mm
44mm
0.01
t(s)
Weight
217 g
GFR Series RCBO Short Circuit Withstand Rating
1+N Pole
277V AC
2
3
4
5
6
Rated current multiple
7 8 9 10
12 14 16 18 20
xIn
GFR Series RCBO
Ground Fault Trip Curve
17.5mm
V
1
1.05 1.35
I
≤20A
IR
10kA
>20A
10kA
Backup
None
Class J Fuse 250A or lower
Altech L Series Branch Circuit Breaker
Altech R Series Supplementary Protector
0.5
0.4
0.2
0.3
0.15
0.1
0.05
0.04
0.03
0.02
0.015
0.01
0.005
0.5
1
0.85 1.15
5
I∆
I∆n
1
35 Royal Road • Flemington, NJ 08822-6000 • t 908-806-9400 • f 908-806-9490 • www.altechcorp.com
GFR Series - 1 Pole+N, C Trip, 10 mA
Applicable voltage systems and wiring examples.
L1
GFR2
277 V
480 V
480 V
L2
277 V
480 V
LOAD
N
277 V
L3
L1
400 V
400 V
Ground Fault Relay
with Overload Protection
240 V
GFR2
L2
UL 1077
240 V
400 V
LOAD
N
240 V
L3
L1
120 V
208 V
GFR2
208 V
L2
120 V
208 V
LOAD
N
120 V
L3
LOAD
N
2
N
L1
120 V
1
N
LINE
240 V
120 V
L2
GFR2
NOTE:
Wiring a hot leg/phase to
N terminal is not permitted.
2
35 Royal Road • Flemington, NJ 08822-6000 • t 908-806-9400 • f 908-806-9490 • www.altechcorp.com
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