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1-Phase Voltage Control Relays

1-phase voltage measurement and control relays RM17UAS⚫⚫ and RM17UBE⚫⚫ monitor:

RM17U_func

Depending on the model, control relays:

  • Allow selection of operating mode
  • Monitor their own power supply measured as a true rms value
  • Are designed for clip-on mounting on a rail

They feature:

  • A sealable cover to help protect the settings
  • A control status indicator LED
RM17UBEOO
RM17UAS15315M

Applications

  • Protection of electronic or electromechanical devices against overvoltage and undervoltage
  • Emergency power supply switching at abnormal conditions
  • Anti short-cycle for compressor used in HVAC machinery

Description

RM17UASOO_desc

RM17UASOO (except RM17UAS15315M)

1. Configuration: selection of operating mode <U / >U, Memory – No Memory

2. Setting potentiometer

3. Hysteresis adjustment potentiometer H

4. Time delay setting potentiometer Tt

5. String for clip-on mounting on 35 mm/1.38 in. rail

RM17UAS15315M

1. Time delay setting potentiometer Tt 

2. Spring for clip-on mounting on 35 mm/1.38 in. rail

RM17UAS15315M_desc
RM17UBE1O_desc

RM17UBE1O

1. Maximum voltage range selection and setting potentiometer

2. Minimum voltage range selection and setting potentiometer

3. Time delay setting potentiometer Tt

4. Spring for clip-on mounting on 35 mm/1.38 in. rail

Operating Principles

Voltage control relays RM17UAS (except RM17UAS15315M) and RM17UBE monitor:

  • Voltage of 1-phase and DC supplies
  • RM17UASpp relays support two operating modes:
    • Overvoltage or undervoltage
    • Fault memory selected or not
  • An adjustable time delay, on crossing the thresholds, provides immunity to transients, and helps prevent spurious triggering of the output relay
  • Fault signaling is by LED
RM17U_legend

RM17 UAS14/UAS15/UAS16 (except RM17UAS15315M)

The operating mode is determined by a switch:

  • Undervoltage with or without memory
  • Overvoltage with or without memory

The position of the configuration switch and the operating mode is read by the product on energization:

  • If the configuration switch is set to an unacceptable position, the product detects a fault, the output relay stays open and the LEDs flash to indicate the position error.
  • If the switch position is changed while the device is operating, all the LEDs flash, but the product continues to operate normally with the function selected at the time of energization preceding the change of position.
  • If the configuration switch is returned to the original position selected prior to the last energization, the LEDs return to their normal state

The undervoltage or overvoltage threshold value is set by a graduated potentiometer clearly indicating the voltage Un to be monitored. The hysteresis is adjusted by a potentiometer graduated from 5…20% of the threshold setting. The hysteresis value must not exceed the limit values of the measuring range.

Undervoltage/Overvoltage without memory

RM17UAS14-15-16_diagram_1
RM17UAS14-15-16_diagram_2

If the controlled voltage falls below the threshold setting for a time greater than that set on the front panel (0.1…10 s), the output relay opens and the R LED goes off. As soon as the voltage returns to a value above (or below) the threshold setting minus (or respectively plus) the hysteresis, the relay instantly closes.

If the controlled voltage exceeds the threshold setting for a time greater than that set
on the front panel (0.1…10 s), the output relay opens and the R LED goes off. As
soon as the voltage returns to a value below the threshold setting plus the
hysteresis, the relay instantly closes.

Undervoltage/Overvoltage with memory

RM17UAS14-15-16_diagram_3
RM17UAS14-15-16_diagram_4

If “Memory” mode is selected, the relay opens when crossing of the threshold is
detected and then stays in that position. The power needs to be switched off to reset the product.

RM17 UBE15/UBE16

Overvoltage + undervoltage control in window mode

These relays operate in window mode where they check that the controlled voltage stays between a minimum threshold and a maximum threshold.

  • The undervoltage or overvoltage threshold values are set by two graduated potentiometers clearly indicating the voltage Un to be monitored. The hysteresis is fixed at 3% of the threshold setting.
  • If the controlled voltage exceeds the high threshold setting, or falls below the low threshold setting for a time greater than that set on the front panel (0.1…10 s), the output relay opens and the R LED goes out. During the time delay, this LED flashes.
  • As soon as the voltage falls below the high threshold setting value minus the hysteresis, or rises above the low threshold setting value plus the hysteresis, the relay instantly closes.
  • On energization of the device with a detected measured fault, the relay stays open.
RM17UBE15-16_diagram

RM17UAS15315M

Undervoltage

If the controlled voltage falls below the threshold (165 V a), the output relay instantly opens and the R LED goes out. As soon as the voltage returns to a value above the threshold plus the hysteresis, the relay closes after the time set on the front panel (3…15 min).

RM17UAS15315M_diagram

Multifunction 1-phase voltage control relays – RM35UA

Multifunction voltage control relays RM35UA1MW monitor both AC and DC voltages.

RM35UA1OMW_func

Depending on the model, the control relays allow:

  • Automatic or ∿ recognition
  • Measurement ranges from 0.05 V to 600 V
  • Selection between overvoltage and undervoltage
  • Measurement as a true RMS value
  • Selectable memory function
  • Clip-on mounting on a rail

They feature:

  • A sealable cover to help protect the settings
  • A control status indicator LED
RM35UA1OMW

Applications

  • DC motor overspeed control
  • Battery monitoring
  • Monitoring of AC or DC supplies
  • Speed monitoring (with tacho-generator)

Description

RM35UA11-12-13MW_desc

RM35 UA11MW/UA12MW/UA13MW

1. Configuration: selection of operating mode <U/ >U, (with or without memory) Memory – No Memory

2. Voltage threshold setting potentiometer U Value

3. Hysteresis adjustment potentiometer H

4. Time delay setting potentiometer Tt

5. Spring for clip-on mounting on 35 mm/1.38 in. rail

Operating Principles

RM35 UA11MW/UA12MW/UA13MW

Multifunction voltage relays RM35UA1MW:

  • Automatically recognize the form of or (50 or 60 Hz) signal
  • Fault signaling is by LED

The operating mode is selected by using a switch:

  • Undervoltage with or without memory
  • Overvoltage with or without memory

The position of the switch and the operating mode is read by the product on energization:

  • If the switch is set to an unacceptable position, the product detects a fault, the output relay stays open and the LEDs flash to indicate the position error.
  • If the switch position is changed while the device is operating, all the LEDs flash, but the product continues to operate normally with the function selected at the time of energization preceding the change of position.
  • If the configuration switch is returned to the original position selected prior to the last energization, the LEDs return to their normal state
RM35UA11-12-13MW_legend

The undervoltage or overvoltage threshold value is set by a potentiometer graduated as a percentage of the scale value of Un to be monitored. The hysteresis is adjusted by a potentiometer graduated from 5…50% of the threshold setting. The hysteresis value must not exceed the limit values of the measuring range.

Overvoltage/undervoltage without memory

RM35UA11-12-13MW_diagram_1
RM35UA11-12-13MW_diagram_2

If the voltage controlled exceeds the threshold setting for a time greater than that set on the front panel (0.3…30 s), the output relay opens and the R LED goes off. During the time delay, this LED flashes. As soon as the voltage drops below the value of the threshold setting, minus the hysteresis, the relay instantly closes.

If the voltage controlled falls below the threshold setting for a time greater than that set on the front panel (0.3…30 s), the output relay opens and the R LED goes off. During the time delay, this LED flashes. As soon as the voltage rises above the value of the threshold setting plus the hysteresis, the relay instantly closes.

Note: Tt: time delay after crossing of the threshold (adjustable on front panel)

Overvoltage/undervoltage with memory

RM35UA11-12-13MW_diagram_3
RM35UA11-12-13MW_diagram_4

If “Memory” mode is selected, the relay opens when crossing of the threshold is detected and then stays in that position. The power needs to be switched off to reset the product.

Note: Tt: time delay after crossing of the threshold (adjustable on front panel)

1-phase voltage control relays – RM22UA and RM22UB

RM22UA and RM22UB 1-phase or DC voltage control relays monitor the following functions:

RM22UA_func

RM22 control relays allow:

  • Automatic AC or DC recognition
  • Selection between overvoltage and undervoltage
  • Monitoring of their own supply voltage measured as a true rms value
  • Selectable memory function
  • Clip-on mounting on a rail

They feature a:

  • Dial pointer LED indicator for relay power ON status
  • Relay output status LED
  • A sealable cover to help protect the settings
  • A control status indicator LED
RM22UA21MR
RM22UA31MR

Applications

  • Protection of electronic or electromechanical devices against overvoltage and undervoltage
  • Emergency power supply switching in abnormal conditions
  • DC motor overspeed control
  • Monitoring of AC or DC supplies
  • Battery and speed monitoring (with tacho-generator)

Description

RM22UA2OMR_desc
RM22UA33MT_desc
RM22UA3OMR_desc
RM22UB34_desc

 1) Configuration: selection of operating mode <U (undervoltage), >U (overvoltage), >U> (overvoltage and undervoltage), MEMORY – NO MEMORY (with or without memory)

2a) Voltage threshold setting potentiometer U value

2b) Undervoltage setting potentiometer <U

2c) Overvoltage setting potentiometer >U

3)   Time delay adjustment potentiometer Tt

4a) Hysteresis adjustment potentiometer Hys

4b) Hysteresis/overvoltage and undervoltage window mode adjustment potentiometer Hys/>U>

5) Diagnostic button

6) Configuration: selection of On-delay or Off-delay

Operating Principles

1-phase voltage control relays monitor:

  • the voltage of 1-phase and DC supplies
  • their own supply voltage for the RM22UB model

An adjustable time delay on threshold crossing, provides immunity to transients, and helps prevent spurious triggering of the output relay.

RM22_legend

RM22 UA2●MR/UA3●MR/UA33MT

The position of the configuration switch and the operating mode is read by the product on energization:

  • If the configuration switch is set to an unacceptable position, the product detects a fault, the output relay stays open, and the LEDs flash to indicate the position error.
  • If the configuration switch position is changed while the device is operating, all the LEDs flash, but the product continues to operate normally with the function selected at the time of energization preceding the position change.
  • If the configuration switch is returned to the original position selected prior to the last energization, the LEDs return to their normal state. 

The undervoltage or overvoltage threshold value is set by means of a potentiometer graduated as a percentage of the scale value of U to be monitored. The hysteresis is adjusted by means of a potentiometer graduated from 5…50% of the threshold setting. The hysteresis value must not exceed the limit values of the measuring range.

Overvoltage without memory

RM22_diagram_1

If the controlled voltage exceeds the threshold setting for a time greater than that set on the front panel (0.1…30 s), the output relay opens and the R LED goes off. During the time delay, this LED flashes. As soon as the voltage drops below the value of the threshold setting minus the hysteresis, the relay instantly closes.

Undervoltage without memory

RM22_diagram_2

If the controlled voltage falls below the threshold setting for a time greater than that set on the front panel (0.1…30 s), the output relay opens and the R LED goes off. During the time delay, this LED flashes. As soon as the voltage rises above the value of the threshold setting plus the hysteresis, the relay instantly closes.

Overvoltage/undervoltage with memory

RM22_diagram_3
RM22_diagram_4

If “Memory” mode is selected, the relay opens when crossing of the threshold is detected and then stays in that position. The power has to be switched off to reset the product.

RM22UA3●MR/UA33MT /UB34

Overvoltage without memory

Guide-Vane-Design-kdk

These relays operate in window mode where they check that the controlled voltage stays between a minimum and a maximum threshold.

  • The undervoltage or overvoltage threshold values are set by means of two graduated potentiometers clearly indicating the Un to be monitored. The hysteresis is fixed at 5% of the threshold setting.
  • If the controlled voltage exceeds the high threshold setting or falls below the low threshold setting for a time greater than that set on the front panel (0.1…30 s), the output relay opens and the R LED goes off. During the time delay, this LED flashes.
  • As soon as the voltage falls below the high threshold setting value minus the hysteresis, or rises above the low threshold setting value plus the hysteresis, the relay instantly closes.
  • On energization of the device with a detected measured fault, the relay stays open.

If “Memory” mode is selected, the relay opens when crossing of the threshold is detected and then stays in that position. The power has to be switched off to reset the product.

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