Secheron UR46-81S, Instruction Manual

Page: 63 / 68

Document number: SG104148TEN Revision: B01 Issue date: 20.8.2012
Copyright© 2012 Sécheron SA - This document is not contractual and contains information corresponding to the level of technology at the date of release.
File: g-UR46-8S_options_en.fm
G-63
UR46-81/82S Options
G.6 Vertical mechanical release
G.6.1 Description of the vertical mechanical release
Used for circuit-breaker mounted on a trolley, the vertical release (1) allows to mechanically open
the circuit-breaker when the trolley is moved out of its working position.
When the roller (1) rolls over an incline, it rises the rod (2), which rotates (8) the plate (2), thereby
lifting (6) the fork (3) and opening the moving contact (4).
04681
G.6.2 Installation - Prerequisites
The wheel (9) must not touch anything when the circuit-breaker is in working position.
The maximum vertical stroke (A) of the rod (10) is 20 mm, and the tripping is occurring around a
stroke (A) of 14 mm. Be sure that your ramp rising the wheel (9) is high enough to let the plate (2)
release the fork (3).
G.6.3 Installation - Adjust the J clearance
The J clearance is the operating clearance between the fork (3) and the plate (2): J=1.0
±0.25
mm.
This procedure is performed with the circuit-breaker closed.
a) Loosen the screw (7) and move laterally the lever (12) in order to bring the rod (1) parallel to
the frame (13).
b) Let the rod (10) go down until it lies onto the plate (11).
c) Rotate clockwise (8) the shaft (2) until the plate 3 touches the fork (3).
d) Lift the rod (10) of 4.5
±0.5
mm (A) without rotating the plate (3).
e) Tighten the screw (7).
f) Check the J clearance with the Sécheron’s “J-M3” gauge; then if needed, re-adjust the J
clearance by loosing the screw (7), slightly rotating the axle (2) and tightening the screw (7).
Important!
When the circuit-breaker trips following a release, the fork (4) remains in closed
position and need to be reset (18) to its open position by giving an “OFF” order to
the closing coil.
9
1
13
10
11
8 7
4
3
2
2
5 18
6
J
A
//
Important!
After the adjustment, at least two open/closing operations must be performed prior
to checking the clearance, to check that nothing interferes with the movement of
the fork (3) as well as with its hooking on the catch (5).