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FSM AG

 | Erich-Rieder-Straße 2 | D-79199 Kirchzarten | [email protected] | www.fsm.ag

13.09.2018

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Operating instructions

Transformator switching relay | Type TSRD

With TSRD the both three-phase transformers and combinations of three individual single-phase transformers can be swit-
ched-on in a three-phase network without inrush currents arising. The required application is selected using DIP-switches. 

Note in safety

Potential separation does not occur during switching of the TSRD as additional RC elements are connected between the 
input and the output thyristor clips. To bypass the thyristors, a bypass contactor must be connected in parallel to the TSRD.

General

The required application is selected using DIP-switches. In the case of applications N and L the transformer core type must 
be selected at TP1 (transformer type) The TSRD has a Message Display Output (Message 1). Depending on the DIP-switch 
selections four different conditions can be displayed. The DIP-switches should be set only when the power is off.

Applications

Application D

Application S

Application N

Application L

Three-phase transformer, prima-

ry side delta or star config. 

without N (neutral) (arbitrarily 
loading). Winding direction
important for transformer
connection.

Three-phase transformer, prima-

ry side star config. with N

(neutral) (arbitrarily loading).
Winding direction important for
transformer connection.

3 single-phase transformers ha-
ving the same core (arbitrarily 
loading). The core type is set at
TP1.

3 single-phase transformers
having the same core (arbitrarily 
loading). The core type is set 
at TP1.

DIP-Switches

No.

Function

Position

1

Error handling

OFF

No automatic restart

ON

Automatic restart after an error

2

Rotation direction recognition

OFF

Switched-on for clockwise phase-sequence

ON

Switched-on for clockwise and anticlockwise phase-sequence

3

Control input 1
(Remote-on input)

OFF

Control input enabled for external control signal

ON

Switched-on without external control signal

4

Control input 2

OFF

Control input enabled for additional external control signal

ON

Switched-on without external control signal

5/6

Message display 1

5

6

Function Message Display 1:

OFF

OFF

Fully-on message

ON

OFF

OK message

OFF

ON

Error message

ON

ON

Bypass contactor control

Note: Installation and commissioning 

have to be undertaken by a qualified 

person or a person under the supervisi-
on of a specialist.

Содержание TSRD

Страница 1: ...e phase transformer prima ry side delta or star config without N neutral arbitrarily loading Winding direction important for transformer connection Three phase transformer prima ry side star config with N neutral arbitrarily loading Winding direction important for transformer connection 3 single phase transformers ha ving the same core arbitrarily loading The core type is set at TP1 3 single phase...

Страница 2: ...splay1 can be applied for various functions Fully On message The relay contact is closed as soon as the connected transformer has been fully switched on by the TSRD when the premagnetisation remnance setting is completed OK message The relay contact is closed after power is supplied to the TSRD and initialisation is complete On malfunction the contact is opened Error message On malfunction the con...

Страница 3: ...d in the bottom left The numbering of the clamps of the transformer must than be changed like showed in the picture in the bottom right L3 left and L1 right and similar connected L3 to L3 and L1 to L1 of the TSRD for softstart the transformer without inrush current peaks via the TSRD and only with the value of the no load current at a delta vector group of the primary side The interconnection of t...

Страница 4: ...ding mode and switches the TSRD off with his opener contacts If any overload or Power line failures occures the TSRD is not influenced with overcurrents or wrong softstart repeating attempts because he is switched off as long as the Bypasscontactor is closed Power line filters must be placed in front of the TSRD In the other way the phase angle cutting softstart procedure leads to high current pea...

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