Installation manual

Série 32 Mlift Vector - Prog.Vectorielle Installation manual Chapter II - page 4
MEASUREMENT OF THE INSULATION OF THE SAFETY CHAIN
EN 81 standard § 13.1.3 a), state that the minimum insulation resistance of the safety chain shall
be 500 000
Ω
1
:
13.1.3 Insulation resistance of the electrical installation (CENELEC HD 384.6.61 S1)
The insulation resistance shall be measured between each live conductor and earth.
Minimum values of insulation resistance shall be taken from
table 5
.
Nominal circuit voltage
V
Test voltage (D.C.)
V
Insulation resistance
M
Ω
SELV
250
≥
0,25
≤
500
500
≥
0,5
> 500 1000
≥
1,0
When the circuit includes electronic devices, phase and neutral conductors shall be connected
together during measurement.
In order to facilitate the measurement of the insulation resistance of the safety chain ask by EN 81-1
Annex
D
§ D.2 f) 1) for electric lifts and EN 81-2 Annex
D
§ D.2 e) 1) for hydraulic lifts,
AUTINOR
controllers are provided with switching terminals named
CV
and
RS
.
These two are Weidmüller model WTR 2.5, reference 101110 which electrical characteristics,
according IEC 947-7-1 are:
For an easy work, the terminals are installed close together on the electromechanical rail and each
terminal have a yellow switching lever; when the two levers are in the off position, all elements of the
controller related to the safety chain are disconnected from the earth.
TO AVOID DAMAGE TO ELECTRONICS, PUT THE LEVERS OF THE 2 TERMINALS CV AND RS IN
THE OFF POSITION BEFORE MEASURING INSULATION!
1
These values are the same to those indicated in table 61 A of standard NF C 15-100, identical to the values
indicated in publication CEI 364-6, not yet harmonised on the level of CENELEC (but which were the subject
of the project of harmonisation PrHD 384-6 in Mars 1990).
Tension 500 V, Intensity 16 A, Section 2,5 mm²
w2
L1
L2
L3
U1
V1
W1
U2
V2
Factory
Wiring
N
CV
RS
CV & RS : SWITCHING TERMINALS FOR
INSULATION OF THE SAFETY CHAIN
EARTH CONNECTION BAR
(EXAMPLE OF ELECTROMECHANICAL RAIL)
2 switching
levers
CV
RS
Measurement of the insulation resistance of the safety chain: example for MB32 controller.