Toshiba 18 - 1250 A - Manual (Page 22)

TE Series Digital Solid State Soft Starters 18 – 1250A
15
Figure 4.1:
TE Power Connections
Chapter 4 – Connections
4.1 Power Connections
Connect appropriately sized power conductors to the unit input
terminals marked L1, L2, L3 (R, S, T for IEC users). Connection points
for units of 160A and below are saddle clamps suitable for stranded
wire. Connection points for units of 210A and above are bus tabs with
pre-drilled holes (see section 2). Use appropriate compression or
mechanical lugs for termination to these bus tabs. Avoid routing power
wires over the control board or display. Connect the motor leads to the
unit terminals marked T1, T2, T3 (U, V, W for IEC users). Refer to local
code standards for wire sizing and length.
If control power is present, but line power is disconnected from L1, L2,
L3, the display will show [n3PH] indicating “no 3 Phase”.
CAUTION
Never interchange input and output connections to
the unit. This could cause excessive voltage in the
control logic circuit and may damage the unit.
4.1.1 Bypass Contactor
Bypass Contactors are integral (built-in) on all TE…-BP (panel mount),
and all TE…–E (NEMA 12 enclosed) versions. See sections 3.2.1.c and
4.2.5 for more details on contactor control and overload protection
details.
4.1.2 Power Factor Correction Capacitors
Power factor correction capacitors can be connected to motors
controlled by TE Series starters, however they must be off-line during
ramping. Connect PFC capacitors to the Line side of the starter with a
separate capacitor control contactor.
WARNING
Never connect power factor correction capacitors on
the load side of the unit. The SCRs will be seriously
damaged if capacitors are located on the load side.
4.1.3 Grounding
Connect the ground cable to the ground terminal as labeled on the unit.
Refer to the National Electrical Code or your local Code for the proper
ground wire sizing and be sure that the ground connector is connected
to earth ground. In ungrounded systems, it is not necessary to connect
a ground to the unit however local codes should always be consulted.
*Larger units (210A and above) can
be ordered with fan cooling instead of
Bypass Contactors, but are intended
for use in NEMA 1 ventilated
enclosures only. Do not use the TE
starter in a sealed enclosure without a
bypass contactor.
Integral
Bypass
Contactor*
TE Starter .
Disconnect
or
Circuit
Breaker
Solid State .
Over Load .
MTR
G
R /
L1
T /
L3 S /
L2
U /
T1
W /
T3
V /
T2