CS/CSP/MCS SERIES CURRENT SWITCHES
31-00432M—01
6
CSP-NO-AVFD OPERATION
The CSP-NO-AVFD-150A utilizes a proprietary sensing
algorithm to detect belt loss on motors operated by
variable frequency drives.
Reliable operation requires variable frequency drive to
increase frequency to a minimum of 40Hz when load is
lost.
Typical load status applications include:
• Proof of flow
• Belt-loss detection
• Coupling shear
100%
Motor Current vs Frequency
Current
OFF
Frequency
60Hz
0Hz
VFD Broken Belt
VFD Normal Operation
Trip Area 40Hz Cal
Trip Area 50Hz Cal
Trip Point @ 40Hz
Trip Point @ 50Hz
Table 2. Specification by Product
Product Number
Trip Point
Core
Type
Max
Current
CS-NO-F-50A
Fixed, 0.25A
SOLID
50A
CSP-NO-F-200A
Fixed, 0.35A
SPLIT
200A
MCS-NO-A-50A
Adjustable,
0.75-50FLA
SOLID
50A
CS-NO-A-50A
Adjustable,
0.75-50FLA
SOLID
50A
CSP-NO-A-100A
Adjustable,
0.50-100FLA
SPLIT
100A
CSP-NO-A-50A
Adjustable,
0.45-50FLA
SPLIT
50A
CSP-NO-A-150A
Adjustable,
0.50-150FLA
SPLIT
150A
CSP-NO-AECM-200A
Adjustable,
0.25-3A Trip
SPLIT
200A
CSP-NO-AVFD-150A
Automatically
detected
above 40 Hz
SPLIT
150A
3PZS
E516382
RoHS Compliant
