General Description; Transport, Storage; Installation; Operation - ABB MS 325 Instrucciones De Servicio

E

General description

The MS 325 is offered in 14 different current ranges: 0.16 - 25 A.
The tripping function prevents a short-circuit on the basis of a current-dependent delayed bimetal overload release and an
instantaneous electromagnetic overload release.
The overload release is adjustable to the consumer current by a setting knob. The overload release is firmly adjusted by the
factory depending upon current range.

Transport, storage

•
ABB manual motor starters are accordingly packed ex factory for the in each case agreed upon transport mode.
•
Avoid blows and impacts.
•
Pay attention to possible damage of the packing or of the device.
•
Store the device dry and weather-protected.
•
Protect the device against dirt.

Installation

Mounting, electrical connection and start-up are only to be done by trained technical personnel. Adhere to the unit-referred
conditions and specifications of the manufacturer. In the case of violation the protection of the explosion proof motor/consumer
is no longer upright.
•
Ensure that motor and wiring correspond to the release class
•
Mounting on mounting rail: Hang device in from above and engage
•
Removing from mounting rail: Actuate latching clip on the device underside with screwdriver
•
Connect the electrical conductors according to the valid guidelines/conductor cross sections: Observe the max. screw
tightening torque of 1.4 Nm.

Operation

•
Setting of the motor rated current on the front adjustment knob. Adjust the desired rated current value on the head of
the arrow.
•
Short-circuit protection: The devices are stable up to a certain limit depending upon mode of operation (values on
rating plate, in the catalogue or on request). When exceeding this limit suitable fuses must be installed in series
(approximate values on request).
•
The tripping period at the coordinate points I
of the motor. Whether this requirement is fulfilled, must be examined using the tripping characteristic.
The appropriate tripping characteristics are contained in this documentation. They can also be requested from the
manufacturer.
•
Motors for heavy starting (ramp-up time > 1.7 x t
Design Test Certificate for EEx e - motors by start up monitoring.
•
All 3 main current paths must be flowed through by current, in order to achieve the indicated equipment
characteristics.
•
Operate only in closed areas without less favourable operating conditions (e. g. dust, corrosive steams, damaging gases).
•
Suitable encapsulations are to be foreseen in dusty and damp rooms.
•
In the case of Ex applications proof of the effectiveness of the installed protection devices is required before start-up!

Commissioning

•
Test the release mechanics by means of pointed item at the test window.
•
Check if all connections have been duly executed.
•
Check rated current setting. The actual currents apply.
ABB STOTZ-KONTAKT
Power manual motor starter MS 325
According to IEC/EN 60 ... 947-1/-4-1/-5-1 for low-voltage switchgear,
Directive 94/9/EG for explosion-protected areas,
EN 60079-14 for electrical equipment for gas explosion endangered areas
EN 50281-1 for electrical equipment for dust explosion endangered area
A
/I (motor starting current ratio) must be smaller than heating up period t
N
–time) are to be protected according to the specifications of the EEC
E
E
9
2CDC 131 005 M5703