Ratings; Contacts - GE ICW51A Instructions Manual

GEH-2056 Power Relays Type ICW
TABLE A
VOLTS
3-PHASE SECONDARY WATTS CURRENT COILS
LINE TO LINE
RANGE
TAPS CONTIN. I-SEC.
120 15-60 15-20-25-32-40-50-60 3.5A 130A
25-100 25-32-40-50-63-80-100 5 185
50-200 50-63-80-100-125-160-200 5
265
100-400
100-125-160-200-240-300-400 5 265
200-800 200-240-300-400-480-600-800
5 265
208 26-104
26-35-44-55-70-87-104 3.5A 130A
44-175 44-55-70-87-110-140-175 5 185
87-350 87-110-140-175-215-275-350 5 265
175-700 175-215-275-350-415-520-700 5 265
350-1400
350-415-520-700-830-1000-1400
5 265
relay provides a control or supervising function, it
has no target seal-in unit. The external connections
for this relay are illustrated in Fig. 1. Sample cal-
culations are provided in the section under CAL-
CULA TIONS OF SETTINGS.
TABLE B
RATINGS
The Type ICW power directional relays covered
by these instructions are available with potential
circuits rated for 120 or 208 volts line to line, 50 or
60 cycles, and with calibration ranges and taps, and
current coil ratings as shown in Table A.
CONTACTS
The main contacts of the relay will carry 2.0
amperes continuously and will close and carry 30
amperes DC momentarily for tripping duty at control
voltages of 250V DC or less. The breaker trip coil
circuit should, however, always be opened by a
circuit breaker auxiliary switch or other suitable
means.
If
the tripping current exceeds 30 amperes
TARGET AND SEAL-IN UNIT
2 Amp Tap
0.2 Amp Tap
DC Resistance
0.13 ohms 7 ohms
Minimum Operating 2.0 amps 0.2 amps
Carry Continuously
3.5 amps
0.35 amps
Carry 30 amps for 4 secs
----------
Carry 10 amps for 30 secs 0.2 secs
60-cycle Impedance 0.53 ohms
52 ohms
an auxiliary tripping relay should be used. TABLE C
On those relays which include a combination INTERRUPTING RATINGS OF MAIN CONTACTS
target and seal-in unit (see DESCRIPTION) the
current-carrying rating of the associated main
contact circuit is determined by the tap setting of
the seal-in coil as shown in Table B:
When the main contacts are not by-passed by
seal-in unit contacts, as in the ICW52A, they may
be required to interrupt the circuit. The interrupting
ratings of the main contacts for inductive and non-
inductive loads are shown in Table C:
The tap values listed in the table are the 3-phase
secondary watts required to close the left contact.
In the case of the Type ICW52A over- and under-
power relay the right contact can be set to close
over a range of 50 to 95 percent of tap value. The
relays are suitable for operation at the continuous
ratings listed above in a maximum ambient of 40
degrees C.
4
VOLTS
125
250
INDUCTIVE
AC DC
0.6A 0.14A
0.3 0.07
INTERRUPT
NON-INDUCTIVE
AC DC
1.5A 0.30A
0.75
0.15