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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de

Voltage Monitoring Type SW

2

Modern electrical switchgear for

energy generation and distributi-

on, for treatment and processing

machines and for a variety of

otherdrivesareusuallyequipped

with measuring and control-

engineering devices.

However,theuseofsuchdevices

demands that the supplied mains

voltagedeviatesonlyslightlyfrom

the nominal value as otherwise

the required accuracy of the

measurements or the actuating signal is not attained,

or downstream units are destroyed by overvoltage.

SW series voltage monitors from ZIEHL are used to

monitor the mains voltage in direct, alternating and

three-phase current networks for undervoltage and/or

overvoltage. If the nominal voltage deviates by various

values which, depending on the consumer, are not

allowed to be undercut, the involved system needs to

be disconnected, or at least the operator needs to be

optically or acoustically warned.

When the mains voltage is ap-

plied, the integrated relay picks

up if the voltage value preset

for the network to be monitored

is not undercut. If the set limit is

undercut, the relay releases.

Type SW voltage monitors com-

ply with Class III acc. VDE 0435

Part 303, Para. 4.8.2, for static

measuring relays (SMR).

Undervoltage monitors (↓) for

three-phase current networks

with N and alternating voltage

networks.Theswitchingpointlies

atapprox.80%UNom.Hysteresis

isapprox.5%.Thevoltagesofthe

3 phases are measured against

the neutral conductor.

A green LED indicates the unit

is ready for service. During un-

dervoltage (<80%), the relay (2

change-over contacts) releases

and the green LED goes out.

The housing can be snapped

onto 35 mm mounting rails and

is perfectly suited for installation

in distribution cabinets.

Voltage Relay for three-phase current

also for alternating current networks

AC 230 V, +10...-30%, < 5 VA

50/60 Hz

2change-over contacts

Type 2 see "general technical informations"

see "general technical informations"

-20°C...+55°C

L1/N: ca. 400 ms, L2/L3: ca. 1 s

Design V2: 90x35x58 [mm], mounting height 55 mm

IP 30 / IP 20

Rated Supply Voltage Us

Frequency

Output Relay

Type of contact

Test conditions

Rated ambient temperature

range

Hysteresis

Delay relay, undervoltage at

voltage breakdown

Dimensions H x W x D

Protection housing/terminals

Technical Data

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2012-05-30

Features:

Monitoring three-phase current networks 3 AC 400 V

with neutral conductor

Monitoring alternating current networks AC 230 V

(connect inputs L1/2/3)

Monitoring own power supply

Switching point fixed 80 %

Output relay 2 change-over contacts

Panel mounted housing, 35 mm wide

K11

K12

K13

K14

L1

L2

L3

N

READY

ALARM

K1

L1

18 15 16 28 25 26

N

Spannungsrelais

SW31V

L2

L3

SW31V

Part number:

S222281

AC 230 V