Siemens SED2 Operations Instructions download pdf (Page 18)

SED2 VFD Electronic Bypass Option Operating Instructions

Electrical Installation

See Figure 6 for all Electronic Bypass Option wiring.

1. Route shielded twisted pair (recommended wire type) cable, 24 gauge minimum control

wiring in conduit through knockout and into housing (Figures 7 through 9). Connect control

wiring per job-specific drawings.

NOTES:

Terminate shield at control device. •

• Control wiring is 12 to 26 AWG and tightening torque is 5 lb-in.

2. If applicable, route communications wiring (P1) in conduit through knockout and into housing

(Figures 7 through 9). Continue to route communications wiring to VFD and terminate per

SED2 VFD Operation & Maintenance Manual.

3. Route motor wiring in conduit through knockout and into housing (Figures 7 through 9).

Connect motor wiring to motor overload and ground lug. See Tables 1 through 4 for wire

sizes and tightening torques.

4. Route input power wiring in conduit through knockout and into housing (Figures 7 through 9).

Connect input power wiring to disconnect switch and ground lug or to circuit breaker and

ground lug. See Tables 1 through 4 for wire sizes and tightening torques.

GND

LUG

(5) (6)

(T1)

OL1

1T1

1T2

(T2)

(T3)

1T3

(1) (2)

(3)

(5) (6)

(4)

(3) (4)

2L1

2L2

VFD

WL3

GND

L2 V

2L3

3L1

3L2

C2C1

3L3

FU1

1L1

1L2

(L1)

(T1)

DISC1

(2)

(4)

(6)

1L3

(L3)

(T3)

GND

(L2)(T2)

1L1 1L2

(5)

(3)

(1)

OPTIONAL SUPPLEMENTARY

POWER FUSES - MAIN SHORT

CIRCUIT PROTECTION BY OTHERS

(SEE NOTE 1)

OPTIONAL

DRIVE INPUT

CONTACTOR

OPTIONAL

INPUT LINE

REACTOR

OPTIONAL

OUTPUT LOAD

REACTOR

AC MOTOR

(CUSTOMER

SUPPLIED)

GND

LUG

POWER

SUPPLY

3 PHASE

60 Hz

BRANCH CIRCUIT PROTECTION TO BE PROVIDED BY INSTALLER,

PER UL508A, IF NOT PROVIDED WITH DRIVE.

FOR BYPASS OPERATION MODIFY THESE DRIVE PARAMETERS:

P0704(0) & P0704(1) = 3, P0748 = DIGITAL OUT 1 REVERSE ( ).

CONTROL & COMMUNICATION WIRING SHOULD BE 300V UL MINIMUM.

COMMUNICATION WIRING SHOULD BE RUN WITH MAXIMUM SEPARATION

POSSIBLE FROM ALL OTHER WIRING.

ESSENTIAL SERVICE MODE OPERATES THE MOTOR FULL SPEED (BYPASS)

WITH NO PROTECTION FOR THE MOTOR OR SYSTEM.

ENSURE THAT AUTOMATIC BYPASS WILL NOT DAMAGE THE SYSTEM

BEFORE ACTIVATING.

REFER TO SIEMENS PUBLICATION NO. 125-3208 FOR PROPER FUSE

AND WIRE SIZES.

REFER TO SIEMENS PUBLICATION NO. 125-3208 FOR SED2 VFD

INPUT/OUTPUT CONTROL SIGNAL WIRING DETAILS.

NOTES:

STEP-DOWN

CONTROL

TRANSFORMER

VFD0110R1

GND

Figure 6. Electronic Bypass Option Wiring Schematic.

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Siemens SED2 Operations Instructions Page 18

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