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5 connecting start circuit wires, 6 auxiliary contacts, 7 optional accessories – Generac Power Systems 09227-0 User Manual

Page 7: Figure 2.6 — auxiliary contact schematic, Switch position utility standby

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Generac

®

Power Systems, Inc.

5

Section 2 — Installation

Generac “V” Type and “Y” Type Transfer Switch

2.5

CONNECTING START CIRCUIT
WIRES

Control system interconnections (Figure 2.5) consist
of UTILITY 1 and 2, LOAD 1 and 2; and leads 23 and
194. Control system interconnection leads must be
run in a conduit that is separate from the AC power
lead. Recommended wire gauge sizes for this wiring
depends on the length of the wire, as recommended
below:

NOTE:

The preceding start circuit connections apply to
the standard 2-wire start system only Your transfer
switch may be equipped with a 3-wire connection
system.

2.6

AUXILIARY CONTACTS

If desired, you can access a set of Auxiliary Contacts
on the Transfer Switch to operate customer acces-
sories, remote advisory lights, or remote annunciator
devices. A suitable power source must be connected
to the COMMON (C) terminal. The contacts labeled 1,
2 and 3 (Figure 2.6) are connected at the factory for
operation of transfer switch advisory lights. Contacts
4, 5 and 6 are available for customer use.

Figure 2.6 — Auxiliary Contact Schematic

Auxiliary contacts are rated 15 amperes at 125, 250 or
480 volts AC; 0.5 ampere at 125 volts DC; 0.25 ampere
at 250 volts DC. DO NOT EXCEED THE RATED
VOLTAGE AND CURRENT OF THE CONTACTS.
Contact operation is shown in the following chart:

2.7

OPTIONAL ACCESSORIES

Note any optional accessories that may be installed
on the transfer switch or are to be installed in the
standby electric system in conjunction with the
switch. Complete the necessary connections for these
accessories.

MAXIMUM WIRE LENGTH

RECOMMENDED WIRE

SIZE

460 feet (140m)

No. 18 AWG.

461 to 730 feet (223m)

No. 16 AWG.

731 to 1,160 feet (354m)

No. 14 AWG.

1,161 to 1,850 feet (565m)

No. 12 AWG.

- OPEN SWITCH TO TEST -

2A @ 250Vac MIN.

SWITCH TYPE, SPST

ELECTRICAL RATINGS,

UTILITY 1

UTILITY 2

LOAD 2

23

194

CB2

NEUTRAL

CONNECTION

N1 N2 N3

E1 E2 E3

NEUTRAL
LUG

TRANSFER

SWITCH

UTILITY

SUPPLY

LOAD

CUSTOMER

19

4

23

LO

AD 2

U

TILITY 2

U

TILITY 1

AC GENERATOR

CONTROL PANEL

NOTE:

POWER LEADS AND
TRANSFER SWITCH
LEADS MUST BE
RUN IN TWO
DIFFERENT CONDUITS.

00

E1

E2

E3

N3, E3 AND T3 NOT
USED ON SINGLE PHASE
SYSTEMS

LO

AD 1

REMOTE TEST

SWITCH (OPTIONAL)

Figure 2.5 — Transfer Switch Interconnections (Drawing #79963-B)

Switch Position

Utility

Standby

Common (4) to Normally Closed (6)

Closed

Open

Common (4) to Normally Closed (5)

Open

Closed

This manual is related to the following products: