Dorman Smith YA7MA Operating Instructions

DORMAN
SMITH
5
7
7
Fig. 1. Outside View
Manual operating handle
1
Lock plate
3
Motor operator nameplate
5
Mounting screws
7
1
* Red: Breaker ON. Green: Breaker OFF. White: Breaker TRIPPED.
AS10214
Motorised Operation
1-1.
Closing Operation
Closing an external ON switch will close the breaker within 0.06 seconds.
Drawing out the lock plate disables the breaker to close.
To enable the breaker closing operation, push in the lock plate securely.
The breaker with undervoltage trip device (UVT) cannot be closed unless
the UVT coil is excited. To close the breaker, apply voltage to the
UVT and wait for 120 milliseconds before closing the breaker.
Open an external ON switch after closing the breaker. If the switch
remains closed, the breaker cannot be closed again after it has opened.
1-2. Opening Operation
Closing a external OFF switch opens the breaker within three seconds.
1-3.
Tripping Operation
When the overcurrent trip device, undervoltage trip device (UVT), or shunt
trip device (SHT) is activated, the breaker trips open automatically and the
indicator shows white.
1-4.
Reset Operation
The tripped breaker can be reset within three seconds by closing an
external OFF/RESET switch.
When the thermal-magnetic circuit breaker is tripped by the thermal
overcurrent
trip device, wait for several minutes before resetting the
breaker.
LOADLINE YA7 FRAME
2
1
Motor Operator
Operating Instructions
Type:
YA7MA
3
6
7
4
1
*
Indicator
2
Control circuit terminals
4
Control circuit nameplate
6
Dorman Smith Switchgear Limited
8 Swinbourne Drive
Springwood Industrial Estate
Braintree Essex
CM7 2YG UK
Tel: +44 (0) 844 225 1063
Fax: +44 (0) 844 225 1064
The Motor Operator motorises the breaker open/close (reset) operation.
The operator also allows you to operate the breaker manually.
Please read these instructions carefully to ensure correct use of the Operator.
This manual is to be delivered to the user after completion of the installation
work.
Safety Notices
Be sure to read these instructions and other associated documents accompanying
the product thoroughly to familiarise yourself with the product handling, safety
information and all other precautions before mounting, using, servicing or
inspecting the product.
In these instructions, safety notices are divided into "Warning" and "Caution"
according to the hazard level.
Warning
A warning notice with this symbol indicates
that neglecting the suggested procedure
or practice could be fatal or result in
serious personal injury.
Caution
A caution notice with this symbol indicates
that neglecting the suggested procedure
or practice could result in moderate or
slight personal injury and/or property
damage.
Note that failing to observe caution notices could result in serious injury/damage
in some situations. As safety notices contain important information, be sure to
read and observe them.
Manual Operation
2-1. Closing and Opening/Reset Operation
Pull down the manual operating handle. The breaker will close when
it has been open, and open when closed (See Table 1).
When the lock plae is drawn out, the manual operating handle cannot
be pulled down. To enable manual operation, push in the lock plate
securely. The breaker with undervoltage trip device (UVT) cannot be
closed unless the UVT coil is excited.
2-2. Tripping Operation
Use the trip button to check the breaker function or alarm switch for
normal operation.
Automatic Spring Charge/Discharge
When the manual operating handle is pulled down while control voltage is applied
to the Motor Operator, the closing spring is automatically discharged or motor-
charged immediately after the handle is retracted. Turning on control voltage
after handle operation without control voltage will also cause the same action.
this mechanism is provided to make the Operator ready for the next motorised
operation.