Description

Two basic units are available – one and two pole, each fitted heavy duty contacts capable can be fitted with a variety if contact arrangements.

The operating dolly can gave three positions, up, central and down, or two positions, the latter being any pair of the three positions. Normally the dolly will remain at the setting at which it is released but can be fitted with a spring return to central, operating from either or both sides. In such cases spring return over the full travel will not cause dolly overrun or contact bounce. A further variation to the lever movement is the fitment of a dolly which will lock at a selected setting until raised and held against its loading spring, this taking a pull of about 1.58kg (3 ½ lbs). The locking action can be applied to any one, two or three settings.

The mechanism incorporates a very firm detent and operates with a device snap action. If the dolly is operated slowly, the contact pressures remain at maximum until the dolly reaches its critical point after 12° movement. The mechanism includes a secondary positive drive which is capable of breaking a light weld between contact faces.

All switches are supplied with accessories for both type A and B mounting.

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Specification

Design Specification: Designed to meet Specification No.AS105/012/1/60
General Design Requirements: AvP24 & BSG.100
Type of Case: Splashproof
Weight: Single Pole 42.5gm (1 ½ oz),two pole 49am (1 ¾ oz)
Method of Mounting: Single pole fixing with back nut or flush for sealed panel
Mounting Attitude: Unrestricted
No. of Poles: One and Two
Contact Arrangement: Large variety of combinations for all range of poles
Electrical Connections: Terminal screws No. 6 unified thread
Normal Operating Voltage: d.c 28 Volts, a.c 200Hz 115 Volts and 200 Volts
Maximum Current Resistive Load: 15 amps per cobtact set, 28 Volts d.c
Ambient Temperature: -65°C to +70°C