Specification

G11-121 (Model RXT Automatic Transfer Switch) 6/12a Page 3
Withstand and Close-On Ratings (WCR)
Service Entrance Transfer Switch Ratings
The service entrance transfer switch is factory-equipped with a normal source disconnect circuit breaker.
Suitable for control of motors, electric discharge lamps, tungsten filament lamps and electric heating equipment where the sum of
motor full-load ampere ratings and the ampere ratings of other loads do not exceed the ampere rating of the switch and the
tungsten load does not exceed 30 percent of switch rating.
Switch Rating, Amps WCR, RMS Symmetrical Amps at 240 VAC
100 *
200 *
22,000
400 * 35,000
* Continuous load current not to exceed 80% of switch rating.
Contactor Ratings with Coordinated Circuit Breakers
Single-phase transfer switches are UL listed at 240 VAC maximum. Three-phase transfer switches are rated at 480 VAC
maximum. The following table lists contactor withstand current ratings (WCR) for 100--400 ampere non-service entrance rated
switches with specific manufacturer’s circuit breakers per UL and Canadian safety standards. Suitable for control of motors,
electric discharge lamps, tungsten filament lamps and electric heating equipment where the sum of motor full-load ampere ratings
and the ampere ratings of other loads do not exceed the ampere rating of the switch and the tungsten load does not exceed 30
percent of switch rating.
The transfer switch is rated for use on a circuit capable of delivering not more than the RMS symmetrical amperes maximum as
shown in the tables below, but no greater than the interrupting capacity of the selected breaker.
WCR Ratings with Specific Manufacturer’s Molded-Case Circuit Breakers
Switch
Rating,
Amps
Voltage,
max.
Number
of Poles/
Phases
WCR, RMS
Symmetrical
Amps
Manufacturer Type or Class
Maximum
Size, Amps
100 240
2 pole/
1 phase
10,000
Eaton/
Cutler-Hammer
FCL, FB, QCHW, GB, GHB, GC, GHC, GD, EHD 100
FDB, FD, HFD, FDC, CA, CAH 150
Square D
FI, FC, FA, FH 100
QOM1, QOM1--VH 125
Q2,Q2--H.Q2H 175
QOM2, QOM2--VH 225
QB, QD, QG, GJ 250
Siemens
CED6, ED2, ED4, ED6, HED4, HED6, QP(Q2125),
QPH(Q2125H)
125
QJ2, QJH2 150
GE
THQB, THQC, THHQB, THHQC 100
THHQL, TQDL, THQDL 125
SE, TQD, THQD, THED 150
200 240
2 pole/
1 phase
10,000
Eaton/
Cutler-Hammer
CSR/BHW, FD, HFD 225
JD, JDB, HJD 225--250
JDC 250
DK, KD, KDB, HKD, KDC, LCL, LA 400
Square D
Q2. QOM2, QOM2--VH, Q2--H, Q2H 225
KI, KA, KH, KC, QB, QD, QG, QJ 250
LE, LX, LXI, LC, LI, LA, LH 400
Siemens FD6-A, FXD6-A, HFD6, CFD6 250
GE
TQDL, THQDL 125
THLC2 225
SF 250