Switch rack SR-81M
+7 (499) 266-69-96
Address
1–33, plot 1, Letchika Babushkina str., Moscow, Russia, 129344

Switch rack SR-81M



Scope and field of application

This device is used in railway automation equipment that is part of signalling, interlocking and blocking systems. SR-81M and SR-81-2500M relay racks are designed for non-module equipment of electric interlocking systems.
Depending on the type, these racks can accommodate up to:
  • 144 REL, PL and OL-type relays on the SR-81M rack;
  • 192 REL, PL and OL-type relays on the SR-81-2500M rack.
Both types of the rack have two bolts 8 mm in diameter, which may be used for ground connections. During operation, free access to these grounding bolts shall be provided.

Main technical features

Insulation dielectric strength  2,000 V 
Dielectric resistance of conducting circuits  1 MΩ 
Device protection class IP30  as per GOST 14254-2015 
Dimensions  459.5 x 925.5 x 2,150 mm - SR-81M;
459.5 x 925.5 x 2,500 mm - SR-81-2500M 
Technical requirements  TU 32 CSh 3314-84 
Weight  95 kg - SR-81M;
106 kg - SR-81-2500M