RM35-3-phase supply control relays

These control relays:

• Accept different nominal 3-phase voltages: 220… 480 V ∿
• 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

1. Voltage range selector switch (220, 380, 400, 415, 440, and 480 V ∿

2. Overvoltage setting potentiometer >U

3. Undervoltage setting potentiometer <U

4. Asymmetry threshold setting potentiometer Asy

5. Time delay adjustment potentiometer Tt

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

3-phase supply control relay RM35TF30 monitors:

• Correct sequence of phases L1, L2, and L3
• Phase loss
• Undervoltage and overvoltage in window mode

• Asymmetry from 5…15% of the supply voltage Un.
• LED indication for relay output status and fault detection (except phase disconnection)

Voltage switch operation:

• Set the switch to the 3-phase supply voltage Un.
• The position of this switch is only taken into account on energization of the device.
• If the switch position is changed while the device is operating, all the LEDs flash, but the product continues to operate normally with the voltage selected at the time of energization preceding the change of position.
• If the switch is returned to the original position selected prior to the last energization, the LEDs return to their normal state

The relay monitors:

• correct sequence of the three phases
• phase loss of at least one of the three phases (U measured < 150 V)
• asymmetry, adjustable from 5 to 15% of Un
• the undervoltage, adjustable from – 2…- 20% of Un (- 2…- 12% in the range 3 x 220 V ∿)
• the overvoltage, adjustable from + 2…+ 20% of Un (+ 2…+ 10% in the range 3 x 480 V ∿ due to the maximum voltage 528 V ∿)
  • If a sequencing or phase loss fault is detected, the relay opens instantly.
  • If an asymmetry or voltage fault is detected, the relay opens at the end of the time delay set by the user.
  • On energization of the device with a detected measured fault, the relay stays open.

RM35UB330, RM35UB3N30

1a. Voltage range selector switch (220, 380, 400, 415, 440, and 480 V ∿)

1b. Voltage range selector switch (120, 127, 220, 230, 240, 260, and 277 V ∿)

2. Overvoltage setting potentiometer >U

3. Undervoltage setting potentiometer <U

4. Undervoltage threshold delay setting potentiometer Tt2

5. Overvoltage threshold delay setting potentiometer Tt1

6. Spring for clip-on mounting on 35 mm/1.38 in. ⍽ rai

Overvoltage/undervoltage control

The relay monitors:

• Phase loss (U measured < 150 V)
• The undervoltage
• The overvoltage
• Each threshold has its own independently adjustable time delay from 0.3 to 30 s.
• If a voltage fault is detected, the corresponding relay (one undervoltage output/one overvoltage output) opens at the end of the time delay set by the user.
  If a phase loss is detected, both relays open instantly without waiting for the end of the time delay set by the user.
• On energization of the device with a detected measured fault, the relays stay open.

Note:

• Tt 1: overvoltage threshold delay (adjustable on front panel)
• Tt 2: undervoltage threshold delay (adjustable on front panel)

Overvoltage/undervoltage + absence of neutral control

The relay monitors:

• Presence of the neutral v the undervoltage
• The overvoltage v phase loss (U measured < 80 V)
• Each threshold has its own independently adjustable time delay from 0.3 to 30 s.
• If a voltage fault is detected, the corresponding relay (one undervoltage output/one overvoltage output) opens at the end of the time delay set by the user.
  In the absence of either neutral or phase, both relays open instantly without waiting for the end of the time delay set by the user.
• On energization of the device with a detected measured fault, the relays stay open.

Note:

• Tt 1: overvoltage threshold delay (adjustable on front panel)
• Tt 2: undervoltage threshold delay (adjustable on front panel)

1. 

   Voltage Control Relay RM35-U - Range 114..329 V AC

   Schneider

   SKU: SE_RM35UB3N30

   Model: RM35UB3N30

   Obsolete

RM35 Harmony multifunction control relays monitor the following functions on
3-phase supplies:

Depending on the model, control relays:

• Accept different nominal 3-phase voltages: 208…480 V ∿ 
• Have phase and temperature control functions that are independent of one another
• Detect line breaks or short-circuit of the temperature probes
• Selection (with or without memory) and Test/Reset function is available
• Are designed for clip-on mounting on a ⍽ rail

They feature:

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

Description – RM35TM50MW, RM35TM250MW

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

2. Temperature contact (11-14)

3. Phase contact (21-24)

4. Configuration: selection of temperature control operating mode (with or without memory) Memory – No Memory

5. Pushbutton (activation of temperature control)

Relays RM35TM50MW and RM35TM250MW monitor:

• Status of the 3-phase supply
• Temperature of motors with embedded PTC probes

The 3-phase supply control function monitors:

• Correct sequence of phases L1, L2, and L3
• Phase loss

• As soon as phase sequence (L1, L2, and L3) and phase presence are considered to be correct, the output relay contact closes and LED R2 is lit.
• If total failure or drop in amplitude of a phase (U measured < 100 V) or inversion of phase sequence is detected, the output relay contact opens and LED R2 goes out.
• The result of the control is indicated by the status of output relay R2, NO contact 21-24 is open in the event of a fault.

• The temperature control relay can take up to 6 PTC (positive temperature coefficient) probes wired in series between terminals T1 and T2.
• A fault is declared when the resistance of the temperature sensing circuit exceeds 3100 Ω.
  Return to normal status is detected when the resistance is once again below 1650 Ω.
• The result of the control is indicated by the status of the “temperature” output relay, NO contact 11-14 is open in the event of a fault.
• Opening of the thermal sensing circuit, which has the same effect as a high temperature (resistance exceeds 3100 Ω), is therefore interpreted as a fault.
• Total short-circuiting of the temperature probe(s), detected when resistance is less than 15 Ω ± 5 Ω, is treated as a fault.
• LED R1 is on when the temperature is correct

• Relay RM35TM250MW has a selector switch which allows the temperature control operating mode to be configured with or without memory.
• In “memory” mode, when a fault is detected, the “temperature” relay locks in the open position.
• As soon as the temperature returns to the correct value, the relay can be unlocked (reset), either by pressing the “Test/Reset” button (for at least 200 ms), or by closing a volt-free contact (for at least 200 ms) between terminal Y1 and T1 (without a parallel load).
• Relay RM35TM250MW can also be reset by switching off the power (see reset time).

• Relay version RM35TM250MW has a “Test/Reset” button which can be used to check that the temperature control function is working correctly and to reset this function after locking in “memory” mode.
• The press and release times are 50 ms for both functions.
  When the temperature is normal, pressing the “Test/Reset” button simulates overheating, the “temperature” output relay contact is open and the <V< LED is off.
• If “memory” mode is not active, “fault” indication is maintained for as long as the button is pressed.
• If “memory” mode is active, “fault” indication is locked and the button needs to be released and pressed again to reset the function.
• In “memory” mode, when a fault has been detected and the temperature has returned to normal, the “temperature” control relay can be unlocked (reset) by pressing the “Test/Reset” button.