3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
GWA 4NEB 430 0999-02b
4-3
Ships' systems
The 3RU11, 3RB10, and 3RB12 overload relays are suitable for use in ships'
systems.
The overload relays have been submitted to:
•GL (Germany)
•LRS (Great Britain)
• DNV (Norway)
Explosion-proof motors
The 3RU11 thermal overload relays and the 3RB10 and 3RB12 electronic
overload relays comply with the regulations for the overload protection of
explosion-proof motors of "increased safety" protection types (EEx d and
EEx e) in acc. with EN 50 019/DIN VDE 0165 and DIN VDE 0170/0171:
• 3RU11: KEMA test certificate no. Ex-97.Y.3235
DMT certificate in acc. with directive 94/9/EC: DMT 98 ATEX G001
• 3RB10: PTB test rules: PTB test report no. 3 43-8803/98
• 3RB12: PTB test rules: PTB test report no. 3 53-3907/96
EC special test certificate in acc. with directive 94/9/EC:
PTB 01 ATEX 3220
In the case of tripping devices with DC operation, electrical isolation must
be secured by means of a battery network or a safety transformer in compli-
ance with DIN VDE 0551.
When the 3RB12..-....1 electronic overload relays (no change to the switch-
ing state of the auxiliary contact elements in the event of the failure of the
control supply voltage) are used to protect EEx d and EEx e motors, sepa-
rate monitoring of the control supply voltage is recommended.
To Next Page
Loading...
Need help?
General