Eaton Cutler-Hammer ATVSKDA30300XSU, Instructions Manual

Page: 29 / 40

I.B. ATS-V003
Page 23
Effective 6/98
If a transfer switch with any kind of electrical operat-
ing capabilities is to be operated manually utilizing
the manual operating handle, it is strongly recom-
mended that the transfer motor circuit first be isolat-
ed. This is accomplished by unplugging the (S3)
plug marked motor disconnect (Figure 5-4). If, how-
ever, a transfer switch is supplied with a four posi-
tion selector switch (Option 6H), it can be turned to
the “OFF” position, making it unnecessary to
unplug the plug. In the case of the automatic trans-
fer switch design, any attempt to operate the manu-
al handle without first isolating the motor circuit
causes an automatic transfer.
5.3 HORIZONTAL DESIGN OPERATION
The horizontal design transfer switch utilizes a pivoting
rocker-arm lever which operates the circuit breaker han-
dles as the arm is moved by a rotating lever usually con-
nected to a transfer motor (Figure 4-5). A slide pin
engaging a pivot in the rotating lever converts rotary
motion to linear motion. Motor limit switches, for motor
equipped transfer switches, are mounted external to the
molded case switches and operated by the rotating
lever. Each limit switch is synchronized with its associat-
ed switch to operate when the switch closes.
When manually operating the transfer switch, the trans-
fer motor circuit should first be isolated by unplugging
the disconnect link. Unscrew the rotating lever slide pin
in the rocker arm lever and remove it. The slide pin is a
left-hand thread and is removed by unscrewing clock-
wise. Pivot the rocker arm lever until the desired posi-
tion is achieved. No special tools are required for this
operation. The rocker arm lever nameplate indicates the
switch position (Normal, Neutral and Emergency).
If a transfer switch with any kind of electrical operat-
ing capabilities is to be operated manually, it is
strongly recommended that the transfer motor cir-
cuit first be isolated. This is accomplished by
unplugging the disconnect link. In the case of the
automatic transfer switch design, any attempt to
operate the manual handle without first isolating the
motor circuit causes an automatic transfer.
Figure 5-3 Indicator Wheel Indicating Neutral
Position on Vertical Design Figure 5-4 Motor Disconnect Being Unplugged
NOTICE
NOTICE