Siemens SIRIUS System Manual

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.

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model