KSB Amarex User Manual

5 Installation at Site
34 of 82
Amarex
2573.820/02-EN
Explosion-proof pump sets (version YS):
An electric circuit with two bimetal switches serves as a temperature monitor. The
bimetal switches (terminals 20 and 21, max. 250V~/ 2A) are connected in series and
open when the winding temperature is too high.
Tripping must result in the pump set cutting out. Automatic re-starting is not
permitted.
5.4.1.6 Leakage inside the motor
DANGER
Incorrect monitoring of leakage electrode
Explosion hazard!
Danger of death from electric shock!
▷ Voltages must be <30VAC and tripping currents <0.5mA.
PE
K 1
9
914.28
69-14
930.28
81-39.28
Wiring of the electrode relay Position of the electrode in the motor housing
An electrode (B2) fitted inside the motor monitors the winding space for leakage.
10)
The electrode is intended for connection to an electrode relay (core marking 9).
Tripping of the electrode relay must result in the pump set cutting out.
Every time the relay trips the pump set, the pump set needs to be inspected and its
insulation resistance measured.
The electrode relay (K1) must trip the motor at a tripping resistance between 3 and
60kΩ.
Example device ▪ Télémécanique RM4-LG01
5.4.2 Electrical connection
DANGER
Electrical connection work by unqualified personnel
Risk of fatal injury due to electric shock!
▷ Always have the electrical connections installed by a trained and qualified
electrician.
▷ Observe regulations IEC 60364 and, for explosion-proof models, EN60079.
10
Optional

KSB Amarex Specifications

General

Material	Cast iron, stainless steel
Operating mode	Continuous
Type	Submersible Pump
Application	Sewage
Explosion protection	Available with explosion protection
Frequency	50 Hz, 60 Hz
Impeller Type	Multi-vane