Description Sensor
Signal Cable,
Number of
Leads Required
Standard or
Optional
Pump current A current transformer in the control cabinet is required.
Power monitoring
Separate electronic instrument using three current
transformers.
Optional
For more information on the stator temperature monitoring, see Stator temperature monitoring methods (page
31).
Signal cables
The pump is delivered with the signal cable (also known as “auxiliary,” “control” or “pilot” cable)
mounted. The following SUBCAB signal cables are available:
• 12x1.5 mm
2
(unscreened, also known as unshielded). Conductors 1-12.
• 24x1.5 mm
2
(unscreened, also known as unshielded). Conductors 1-24.
• S12x1.5 mm
2
(screened, also known as shielded). Conductors 1-12.
• S24x1.5 mm
2
(screened, also known as shielded). Conductors 1-24.
The number of conductors required to connect the sensors to the monitoring system depends on the
number and type of sensors being used. Medium-voltage (1.2–6.6 kV) drive units always have 24 signal
cable leads.
Monitoring alternatives: MAS and CAS overviews
Monitoring system identification
The monitoring system appears on the drive unit's data plate in the “Additional Information” field. For
more information about the drive unit data plate, see The data plates (page 43).
MAS system
MAS is the standard monitoring equipment.
Pumps with the standard MAS equipment with a 12-lead auxiliary cable are mounted with the following
items:
• Thermal switches for stator temperature monitoring (3 in series) or PTC-thermistors
• Leakage sensor in the stator housing
• Leakage sensor in the junction box
• Analogue temperature sensor (Pt100) for main bearing temperature monitoring
• Analogue temperature sensor (Pt100) for stator winding temperature in one phase
• Pump memory
Pumps with the optional MAS equipment with a 24-lead auxiliary cable are mounted with the following
possible options:
• Vibration sensor VIS10
• Analogue temperature sensor (Pt100) for stator winding temperature in phases 2 and 3
• Leakage sensor in the oil housing (CLS)
• Analogue temperature sensor (Pt100) for support bearing temperature monitoring
CAS system
Older pumps may be installed with the CAS system.
Pumps with the standard CAS equipment 12-lead auxiliary cable are mounted with the following items:
• Thermal switches for stator temperature monitoring (3 in series) or PTC-thermistors
• Leakage sensor in the stator housing
• Leakage sensor in the junction box
• Analogue temperature sensor (Pt100) for main bearing temperature monitoring
Product Description
26 C3300/6x5, C/R3231, C3240, C3306, C3312, C3351, C3356, C3400, C3501, C3531, C3602, C3800 Installation,
Operation and Maintenance Manual
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