ABB MS 325 Instruction Manual
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Operating instructions Low-voltage switchgear
According to IEC/EN 60 ... 947-1/-4-1/-2-1 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
Power manual motor starter
MS 325
II (2) GD
Table of contents
Safety instructions .............................................. 7
Technical data .................................................... 8
General description ............................................ 9
Transport, storage .............................................. 9
Installation .......................................................... 9
Operation ........................................................... 9
Commissioning................................................... 9
Example of the suitability of an overload relay . 10
Dimensions ...................................................... 10
Approvals and authorizations ........................... 10
Tripping characteristics .................................... 31
Safety instructions
¦ Type MS 325 ABB manual motor starters
are suitable for the protection of motors of
the protective system EEx e. It has been
checked and certified by the Physikalisch
Technische Bundesanstalt (PTB) in Braunschweig.
¦ Mounting and installation may only be done
by trained technical personnel, who observe
the relevant regulations!
¦ Insufficiently tightened locking screws lead
to an inadmissible rise in temperature!
¦ A triggered device may only be restarted
after elimination of the cause of failure by
trained technical personnel.
¦ The device may only be opened by technical
personnel authorized by the manufacturer.
Non-observance results in the expiry of all
warranty claims!
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Power manual motor starter MS 325
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Technical Data
Rated operating voltage Ue [V] 690
Rated insulation voltage Ui [V~] 690
Rated current Ie [A] 0.1 ... 25 / 14 ranges
Tripping class 10A
Rated frequency [Hz] 50/60, other frequencies (16 2/3 … 400) on request
Electromagnetic tripping
Response values 0.1 ... 0.63 A: 7.5 - 12 times (x Ie)
Disconnected characteristics according to IEC/EN 60947-1
Service life mechanical/electrically 100.000 connections
Permissible ambient temperature
- Storage [°C] -50 to +80
- Operation [°C] -20 to +50
Temperature compensation [°C] -20 to +50
Phase-failure protection asymmetrical load activates premature release
Protection system IP20
Connection cross sections Clamp screw size: Pozidrive size 2
Torque of the cage clamps max. 1.4 Nm
Wire [mm²] 1 x 10 / 2 x 4
Rope, 7-stranded [mm²] 1 x 10 / 2 x 4
Wire strand [mm²] 1 x 6
Mounting position any
Mounting can be snapped on 35 mm
Approvals and authorizations see page 10
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
0.63 … 2.50 A: 9 - 14 times
2.5 ... 6.30 A: 10 - 15 times
6.3 … 25 A: 12.5 - 17.5 times
8
2CDC 131 005 M5703
ABB STOTZ-KONTAKT
Power manual motor starter MS 325
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.
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
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.
(motor starting current ratio) must be smaller than heating up period t
A/IN
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.
–time) are to be protected according to the specifications of the EEC
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• 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.
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ABB STOTZ-KONTAKT
9
2CDC 131 005 M5703
E
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
Example of the suitability of a selected manual
motor starter:
The motor with increased security has the following data
(normal starting up):
Output = 7.5 kW
= 7.4
I
A/IN
tE-Time = 11 seconds
Tripping curve downwards, the tripping time is lower
than the t
[s]
-time of the motor.
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40
20
11
10
6
JJ
JJ
J
4
3
Dimensions
2
Tripping time
1
3
4
5
Multiple of setting current
7 8
6
7.4
Approvals and authorizations
Approvals Ship classification companies
Phys.-Techn.
Bundesanstalt
UL CSA EEx ''e'' GL LRS BV DNV
USA Canada Germany Germany Great Britain France Norway
■■■■■■■
■ Approval available; rating plates carry the test symbol, if sign obligation exists.
PTB
10
2CDC 131 005 M5703
ABB STOTZ-KONTAKT
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