Xylem Flygt 2620.172, Инструкции по обслуживанию и ремонту

Страница: 15 / 72

WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an additional ground- (earth-) fault
protection device to the grounded (earthed) connectors if persons are likely to come into
contact with liquids that are also in contact with the pump or pumped liquid.
Ground (earth) conductor length
The ground (earth) conductor must be longer than the phase conductors in the junction
box of the unit.
The table shows how much longer, than the phase conductors, the ground (earth)
conductor must be.
Pump Extra length of ground conductor, mm (in.)
2620.172
2620.281 270 (10.6)
3.2.3 Product-specific precautions
This information is valid only for standard version products.
For a pump with a level regulator and a cable with ground (earth) check: Make sure that
the ground (earth) check connection is done at the GC-connection point with a cable lug
and one screw. Connect the ground cable from the level switch to the other screw at the
GC-connection point.
3.2.4 Prepare the SUBCAB ™ cables
This section applies to SUBCAB ™ cables with twisted-pair control cores.
The prepared SUBCAB ™ cable The prepared screened SUBCAB ™ cable, without cable lugs
SUBCAB 1000V
T
1
T2
1
2
3
4
5
6
WS004299E
1. T1+T2 twisted pairs in control element
2. Drain wire in control element (bare aluminum wire)
3. Aluminum foil, screen
4. Insulation sheath (plastic jacket) or PT-foil for control element
5. Power cores
6. Ground (earth) core
WS004298F
Screened SUBCAB
1
5
6
7
8
2
9
3 4
1. T1+T2 and T3+T4 twisted pairs in control element
2. Drain wire in control element (tinned copper strands) with shrink hose
3. Aluminum and textile layers
4. Insulation sheath or plastic jacket, for the control element
5. Power cores
6. Plastic laminated aluminum foil, screen
7. Ground (earth) core with yellow-green shrink hose
8. Uncovered screen/braided wire
9. Shrink hose
1. Peel off the outer sheath at the end of the cable.
2. Prepare the control element:
a) Peel the sheath (if applicable) and the aluminum foil.
The aluminum foil is a screen and is conductive. Do not peel more than necessary,
and remove the peeled foil.
3 Installation
2620.172/.281 Service and Repair Instructions 13