Spec Sheet

POWERCOMMAND
®
OTEC TRANSFER SWITCH SPEC SHEET
BREAKER PROTECTION
MOLDED CASE CIRCUIT BREAKER
(MCCB) PROTECTION
SPECIAL CIRCUIT
BREAKER PROTECTION
Frame
Amperage
rating
(A)
With specific
manufacturers
MCCB
(kA at 480V)
With specific
manufacturers
MCCB
(kA at 600V)
Max
MCCB
ratings
(A)
Drawing
reference
With
specific
Current
limiting
breakers
(kA at 600V)
Max.
Current
limiting
breakers
CLB
rating (A)
Drawing
reference
A 125 14 14 225 A050J441 200 225 A048J566
B 225 30 30 400 A048E949 200 400 A051D533
C 400, 600 65 65 1200 A056M829 200 1200 A048J564
FUSE PROTECTION
Frame
Amperage
rating (A)
WCR with current
limiting fuses (kA)
Fuse size and type
Drawing
reference
A 125 200 200 A, Class: J, RK1, RK5, T A050J441
B 225 200 1200 A Class L or T, or 600A class J, RK1, RK5 A048E949
C 400, 600 200 1200 A Class L or T, or 600A class J, RK1, RK5 A056M829
*All WCR values are at 600 V
TRANSITION MODES
Open delayed transition – In this transition
mode the time required for the transfer switch to
transfer between sources is adjustable so that the
loadgenerated voltages decay to a safe level before
connecting to an energized source. Recommended
by NEMA MG-1 to prevent nuisance tripping breakers
and load damage. Adjustable 0.5 secs-10 minutes,
and default 0.5 seconds.
Open in-phase translation – Initiates open transition
transfer when in-phase monitor senses both sources
are in phase (voltage, phase and frequency). Operates
in a break-before-make sequence. Includes ability
to enable programmed transition as a backup. The
module waits indenitely for synchronization unless the
‘Return to programmed transition’ function is active in
which case after 2 minutes it performs a programmed
delayed transfer.
UL 1008 WITHSTAND AND CLOSING
RATINGS (WCR)
The transfer switches listed below must be protected
by circuit breakers or fuses. Referenced drawings
include detailed listings of specic breakers or fuse
types that must be used with the respective transfer
switches. Consult with your distributor/dealer to
obtain the necessary drawings. Withstand and
Closing Ratings (WCR) are stated in symmetrical
RMS amperes.
TIME BASED RATINGS: 0.05S (3-CYCLES AT 60 HZ)
Frame Amperage rating (A) WCR (kA at Vmax and below) Max. MCCB rating (A) Drawing reference
C 400, 600 25 at 600 V 1200 A056M829