1SVR730794R2300 ABB CM-PVS.81S Three-Phase Monitoring Relay 200–400 V AC
ABB CM-PVS.81S 1SVR730794R2300 is a 3 × 200–400 V AC three-phase monitoring relay with phase failure, selectable phase sequence, adjustable overvoltage and undervoltage monitoring, adjustable tripping delay and two changeover contacts.
Why Choose the ABB CM-PVS.81S Three-Phase Monitoring Relay?
The ABB CM-PVS.81S 1SVR730794R2300 is a compact three-phase monitoring relay designed to supervise important supply conditions in industrial three-phase systems. It monitors phase failure, phase sequence, overvoltage and undervoltage, enabling control systems to respond when the incoming supply moves outside the required operating conditions.
The CM-PVS.81S operates directly from its monitored 3 × 200–400 V AC line-to-line supply, eliminating the need for a separate auxiliary supply. It uses a TRMS measuring principle, provides adjustable absolute overvoltage and undervoltage thresholds, and allows phase-sequence monitoring to be switched off when it is not required.
Two changeover (SPDT) output contacts rated at 250 V / 4 A provide signalling and control capability. A fixed 200 ms start-up delay is complemented by an adjustable tripping delay from instantaneous operation to 30 s, with selectable ON- or OFF-delayed response, while screw terminals and a slim 22.5 mm housing support straightforward DIN-rail installation.
Key Advantages
Combines phase failure, phase sequence, overvoltage and undervoltage monitoring in one device.
Designed for 3 × 200–400 V AC line-to-line three-phase systems.
TRMS measuring principle provides reliable voltage evaluation.
Adjustable absolute overvoltage and undervoltage threshold values.
Phase-sequence monitoring can be switched off when not required.
Powered directly from the monitored circuit, avoiding a separate auxiliary supply.
2 c/o (SPDT) contacts provide flexible alarm and control outputs.
Selectable instantaneous or 0.1–30 s tripping delay.
Selectable ON- or OFF-delayed tripping response.
Compact 22.5 mm DIN-rail housing conserves panel space.
Key Features
ABB CM-PVS.81S three-phase monitoring relay.
3 × 200–400 V AC rated control supply and measuring voltage.
50/60 Hz rated supply frequency.
Phase failure detection.
Selectable phase-sequence monitoring.
Adjustable overvoltage monitoring.
Adjustable undervoltage monitoring.
TRMS measuring principle.
200 ms start-up delay.
Tripping delay selectable between 0 s and 0.1–30 s.
Selectable ON- or OFF-delay tripping function.
2 changeover (SPDT) output contacts.
Output contacts rated at 250 V / 4 A.
3 LEDs for indication of operational states.
Screw terminals with double-chamber cage connection technology.
Comprehensive Three-Phase Supply Monitoring
The ABB CM-PVS.81S continuously supervises a 3 × 200–400 V AC three-phase supply for voltage and phase abnormalities. Adjustable overvoltage and undervoltage thresholds define the acceptable operating window, while phase-failure detection and selectable phase-sequence monitoring help identify supply conditions that could interrupt operation or adversely affect connected three-phase equipment.
Its TRMS measuring principle provides dependable voltage evaluation, while the adjustable tripping delay can prevent short-duration disturbances from causing an unwanted response. With selectable ON- or OFF-delayed operation and two changeover contacts, the CM-PVS.81S can be integrated into alarm circuits, contactor controls, machine interlocks and other protective control functions.
Typical Applications
Three-phase mains voltage supervision.
Phase failure detection.
Phase-sequence monitoring.
Overvoltage and undervoltage supervision.
Three-phase motor and pump control systems.
Compressors, fans and material handling equipment.
Industrial machinery and process automation.
Electrical control and distribution panels.
Technical Specifications
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Time Delay
Adjustable
Monitored Supply
Three-phase
Signal / Input Range
3 × 200–400 V AC
Monitoring Function
Three-phase supply
Series
CM-PVS
ABB order code
1SVR730794R2300
Product type
Three-phase monitoring relay
Monitoring functions
Phase failure, phase sequence, overvoltage and undervoltage
Rated control supply voltage
3 × 200–400 V AC, line-to-line
Measuring range
3 × 200–400 V AC, line-to-line
Rated frequency
50/60 Hz
Measuring principle
TRMS
Voltage thresholds
Adjustable as absolute values
Phase-sequence monitoring
Selectable
Start-up delay
200 ms
Tripping delay
0 s or 0.1–30 s, adjustable
Tripping function
ON-delay or OFF-delay, selectable
Output
2 c/o (SPDT) contacts
Contact rating
250 V / 4 A
Status indication
3 LEDs
Terminal type
Screw terminals
Housing protection
IP50
Terminal protection
IP20
Operating temperature
-25 to +60 °C
Storage temperature
-40 to +85 °C
Maximum output circuit operating voltage UL/CSA
300 V AC
UL/CSA contact rating
B300
Product width
22.5 mm
Product height
85.6 mm
Product depth
103.7 mm
Product net weight
0.136 kg
EAN
4016779876483
Frequently Asked Questions
What is the ABB CM-PVS.81S 1SVR730794R2300 used for?
It is a three-phase monitoring relay used to supervise phase failure, phase sequence, overvoltage and undervoltage conditions in three-phase AC electrical systems.
What voltage range does the CM-PVS.81S monitor?
The CM-PVS.81S is designed for a line-to-line three-phase measuring and supply voltage of 3 × 200–400 V AC.
Does the CM-PVS.81S require a separate control supply?
No. The CM-PVS.81S is powered directly by its measuring circuit, so its rated control supply voltage corresponds to the monitored 3 × 200–400 V AC three-phase supply.
Can phase-sequence monitoring be disabled on the CM-PVS.81S?
Yes. Phase-sequence monitoring is selectable and can be switched off when phase-rotation supervision is not required by the application.
Does the CM-PVS.81S have an adjustable tripping delay?
Yes. The relay has a 200 ms start-up delay and a tripping delay selectable between instantaneous operation and 0.1–30 s, with either ON- or OFF-delayed tripping selectable.
Trusted ABB Three-Phase Monitoring Technology
ABB CM-PVS three-phase monitoring relays provide dependable supervision of phase and voltage conditions in industrial electrical systems, helping machine builders, panel builders and operators integrate effective supply monitoring, alarm and protective control functions.
Time Delay
Adjustable
Monitored Supply
Three-phase
Signal / Input Range
3 × 200–400 V AC
Monitoring Function
Three-phase supply
Series
CM-PVS
ABB order code
1SVR730794R2300
Product type
Three-phase monitoring relay
Monitoring functions
Phase failure, phase sequence, overvoltage and undervoltage
Rated control supply voltage
3 × 200–400 V AC, line-to-line
Measuring range
3 × 200–400 V AC, line-to-line
Rated frequency
50/60 Hz
Measuring principle
TRMS
Voltage thresholds
Adjustable as absolute values
Phase-sequence monitoring
Selectable
Start-up delay
200 ms
Tripping delay
0 s or 0.1–30 s, adjustable
Tripping function
ON-delay or OFF-delay, selectable
Output
2 c/o (SPDT) contacts
Contact rating
250 V / 4 A
Status indication
3 LEDs
Terminal type
Screw terminals
Housing protection
IP50
Terminal protection
IP20
Operating temperature
-25 to +60 °C
Storage temperature
-40 to +85 °C
Maximum output circuit operating voltage UL/CSA
300 V AC
UL/CSA contact rating
B300
Product width
22.5 mm
Product height
85.6 mm
Product depth
103.7 mm
Product net weight
0.136 kg
EAN
4016779876483
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