Mody Pumps MS 121 - Manual (Page 6)

MOTOR PROTECTION
IT IS ESSENTIAL THAT THE PUMP BE USED WITH A STARTER AND PREFERABLY A PANEL
BOARD. PANEL BOARDS INCORPORATING ALL PROTECTIVE DEVICES ARE AVAILABLE WITH US.
THE FULL LOAD AMPERE RATINGS OF THE TWO MODELS ARE AS PER TABLE BELOW. THE
OVERLOAD RELAY IN THE STARTER SHOULD BE CHOSEN ACCORDINGLY AND AMPERES SET AT
THE FULL LOAD SETTING FOR THE PARTICULAR MODEL OF THE PUMP. (DETAILS BELOW ARE
FOR 230/460 VOLT PUMPS. CHECK FULL LOAD AMPERES FOR DIFFERENT VOLTAGES ON PUMP
NAME PLATE)
MODEL FULL LOAD AMPERES .
MS 121 2.7 AMPS @ 460V – 5.4 AMPS @ 220v
POWER CABLE OPTIONS
A) FOUR CORE CABLE
THE PUMP IS SUPPLIED WITH A FOUR CORE CABLE AND THE FUNCTION OF THE SAME IS AS
UNDER:
• RED/YELLOW(WHITE)/BLUE(BLACK) ARE THE POWER CORES.
• GREEN CORE IS FOR EARTHING.
B) SIX CORE CABLE
THE PUMP IS SUPPLIED WITH A SIX CORE CABLE AND THE FUNCTION OF THE SAME IS AS
UNDER:
• RED/YELLOW(WHITE)/BLUE(BLACK) ARE THE POWER CORES.
• GREEN CORE IS FOR EARTHING.
• ORANGE AND BLUE ARE FOR THERMALS
THREE THERMAL SWITCHES ARE EMBEDDED IN THE MOTOR WINDING OF WHICH TWO ARE
CONNECTED IN SERIES. THESE ARE CONNECTED TO THE WHITE CORES OF THE CABLE. THE
WHITE CORES OF THE CABLE ARE TO BE CONNECTED IN SERIES WITH THE CONTACTOR COIL
OF THE STARTER. THIS IS MOST IMPORTANT.
IN THE EVENT OF OVERHEATING OF THE STATOR WINDING FOR ANY REASON, THE
EMBEDDED THERMAL SWITCHES WILL OPEN, CAUSING THE STARTER COIL TO DROP OUT AND
ISOLATE THE PUMP UNIT FROM THE MAINS. THESE SWITCHES DO NOT PROVIDE ANY
PROTECTION IN THE CASE OF A SHORT CIRCUIT, AND ADEQUATE H.R.C. FUSES SHOULD BE
USED FOR SHORT CIRCUIT PROTECTION.
C) MODYCAB SEVEN CORE CABLE
THE PUMP IS SUPPLIED WITH A SEVEN CORE CABLE AND THE FUNCTION OF THE SAME IS AS
UNDER:
• RED/WHITE/BLACK ARE THE POWER CORES.
• GREEN CORE IS FOR EARTHING.
• TWO # 16 AWG WHITE CORES ARE FOR THERMALS
• ONE # 16 AWG BLACK CORE IS THE SEAL PROBE SENSOR
THE SEAL PROBE SENSOR NEEDS TO BE WIRED TO AN ABB LLC4 LIQUID LEVEL PROBE
SENSOR THAT DETECTS MINUTE AMOUNTS OF FLUID IN THE OIL CHAMBER INSIDE THE
CONTROL PANEL. SEE FOLLOWING DIAGRAM.