Monitoring Relays

Mechanical design

• Self-extinguishing plastic housing, IP rating IP40 Mounted on DIN-rail TS 35 according to EN 50022
• Mounting position:
  • any
• Shockproof terminal connection accordting to VBG 4 (PZ1 required), IP rating IP20
• Tightening torque:
  • max. 1Nm
• Terminal capacity:
  • 1 x 0.5 to 2.5mm2 with/without multicore cable end
  • 1 x 4mm2 without multicore cable end
  • 2 x 0.5 to 1.5mm2 with/without multicore cable end
  • 2 x 2.5mm2 flexible without multicore cable end

Accuracy

• Base accuracy: ±5% of rated voltage
• Adjustment accuracy: 5% of maximum scale value
• Repetition accuracy: 2%
• Voltage influence: -
• Temperature influence: ≤1%

Functions

Undervoltage monitoring for 3-phase mains with fixed threshold voltage and fi xed hysteresis. All measuring inputs (L1, L2 and L3) must be connected to phase voltage. If single or 2-phase monitoring is required, unused input terminals (L) must be connected to mains voltage to have proper L-N voltage on the terminals L1, L2 and L3. If there is a reverse voltage on account of a consumer, which exeeds the fixed threshold, detection of phase failure isn't possible.

Undervoltage monitoring with ON delay (Option E)

When the voltage of all connected phases exeeds the fixed threshold by more than the fixed hysteresis, the set interval t begins (green LED U/t flashes). After the set interval t has expired, the output relay R switches into on-position (yellow LED R illuminated, green LED U/t illuminated). When the voltage of one of the connected phases falls below the fixed threshold, the output relay R switches into off-position (yellow LED R not illuminated, green LED U/t not illuminated).

Input circuit

• Supply voltage:
  • (=measuring voltage)
• Terminals:
  • N-L1-L2-L3
• Rated voltage UN:
  • 3N~400/230V
• Tolerance:
  • -30% to +15% of U N
• Rated consumption:
  • 6VA (0,8W)
• Rated frequency:
  • 48 to 63Hz
• Duty cycle:
  • 100%
• Reset time:
  • 500ms
• Hold-up time: -
• Drop out voltage:
  • determined by undervoltage detection (see measuring circuit)
• Overvoltage category:
  • III (in accordance with IEC 60664-1)
• Rated surge voltage:
  • 4kV (in accordance with IEC 60664-1)

Functions

AC/DC undervoltage monitoring in 1-phase mains with adjustable threshold and fixed hysteresis.

• UNDER
  • Undervoltage monitoring

The supply voltage U must be constantly applied to the device (green LED illuminated).

The output relay R switches into on-position (yellow LED illuminated) when the measured voltage U exceeds the value adjusted at the Usregulator. The output relay R switches into off-position (yellow LED not illuminated) when the measured value for the voltage falls below the set value by more than the fixed hysteresis.

Functions

Undervoltage monitoring in 3-phase mains (each phase against the neutral wire) with fixed or variable threshold voltage US and fixed hysteresis.

Time range

• Adjustment range
  • Tripping delay : fixed, approx. 200ms

Input circuit

• Supply voltage:
  • (= measured voltage)
• Terminals:
  • N-L1-L2-L3
• Rated voltage UN:
  • see table ordering information or printing on the unit
• Tolerance:
  • -30% to +10% of UN
• Rated consumption:
  • 8VA (0,8W)
• Rated frequency:
  • AC 48 to 63Hz
• Duty cycle:
  • 100%
• Reset time:
  • 500ms
• Hold-up time: -
• Drop out voltage:
  • determined by undervoltage detection (see measured circuit)
• Overvoltage category:
  • III (in accordance with IEC 60664-1)
• Rated surge voltage:
  • 4kV

Functions

Temperature monitoring of the motor winding (max. 6 PTC) with fault latch for temperature sensors in accordance with DIN 44081, short circuit monitoring of the thermistor line (selectable by means of terminals), integrated test/reset key.

Temperature monitoring of the motor winding with fault latch. If the supply voltage U is applied (green LED illuminated) and the cumulative resistance of the PTC-circuit is less than 3.6kΩ (standard temperature of the motor), the output relay switches into on-position. Pressing the test/reset key under this conditions forces the output relay to switch into off-position. It remains in state as long as the test/reset key is pressed and thus the switching function can be checked in case of fault. The test function is not effective by using an external reset key. When the comulative resistance of the PTC-circuit exceeds 3.6kΩ(at least one of the PTCs has reached the cut-off temperature), the output relay switches into off-position (red LED illuminated). The output relay switches into on-position again (red LED not illuminated), if the cumulative resistance drops below 1.6Ω5k by cooling down of the PTC and either a reset key (internal or external) was pressed or the supply voltage was disconnected and re-applied.

Input voltage

• Supply voltage: 230V AC
• Terminals: A1-A2
• Rated voltage UN: 230V AC
• Tolerance: -15% to +10% of U N
• Rated consumption: 1,3VA (1W)
• Rated frequency: AC 48 to 63Hz
• Duty cycle: 100%
• Reset time: 250ms
• Residual ripple for DC: 50ms
• Drop-out voltage: >30% of the supply voltage
• Overvoltage category: III (in accordance with IEC 60664-1)
• Rated surge voltage: 6kV

Measuring circuit

• Terminals: T1-T2 or T1-T3
• Initial resistance: <1.5kΩ
• Response value (relay in off-position): ≤3.6kΩ
• Release value (relay in on-position): ≤1.65kΩ
• Disconnection (short circuit thermistor): yes at T1-T2 no at T1-T3
  Measuring voltage T1-T2: ≤7.5VΩat R≤4.0kΩ (in accordance with EN 60947-8)
• Overvoltage category: III (in accordance with IEC 60664-1)
• Rated surge voltage: 6kV

Functions

Level monitoring of conductive liquid, timing for tripping delay and turn-off delay seperatly adjustable and the following functions (selectable by means of rotary switch):

• Pump up pump up or minimum monitoring
• Pump down pump down or maximum monitoring

Pump up

Connection of the probe rods E1, E2 and E3. Alternatively the electrically conducting container can be connected in lieu of the test probe E3. When the air-fluid level falls below the minimum probe E2 the set interval of tripping delay (Delay ON) begins. After the expiration of the interval, the output relays R switches into on-position (yellow LED illuminated). When the air-fluid level again rises above the maximum probe E1, the set interval of turn-off delay (Delay OFF) begins. After the expiration of the interval the output relays R switches into off-position (yellow LED not illuminated).

Pump down

Connection of the probe rods E1, E2 and E3. Alternatively the electrically conducting container can be connected in lieu of the test probe E3. When the maximum probe E1 gets moistened the set interval of tripping delay (Delay ON) begins. After the expiration of the interval the output relays R switches into on-position (yellow LED illuminated). When the air-fluid level falls below the minimum probe E2, the set interval of turn-off delay (Delay OFF) begins. After the expiration of the interval, the output relays R switches into offposition (yellow LED not illuminated).

PROBES FOR LEVEL MONITORING

• URL 90010, URL 90020, URL 90030 types are coated with Nylon 66
• Operating temperature max. 70 °C
• Maximum pressure 1000 kPa
• Can be used universally expect for special areas of the food industry where Nylon 66 is not approved for use as an insulator.

Time ranges

• Adjustment range
  • Tripping delay (Delay ON): 0.5s to 10s
  • Turn-off delay (Delay OFF): 0.5s to 10s

Input circuit

• Terminals:
  • A1-A2
• Rated voltage UN:
  • 230V AC
• Tolerance:
  • -15% of +10% of U N
• Rated consumption:
  • 2VA (1.0W)
• Rated frequency:
  • AC 48 to 63Hz
• Duty cycle:
  • 100%
• Reset time:
  • 500ms
• Hold-up time: -
• Drop-out voltage:
  • >30% of supply voltage
• Overvoltage category:
  • III (in accordance with IEC 60664-1)
• Rated surge voltage:
  • 6kV

Functions

AC current monitoring in 1-phase mains with adjustable threshold and fixed hysteresis.

The supply voltage U must be constantly applied to the device (green LED illuminated). The output relay R switches into on-position (yellow LED illuminated) when the measured current exceeds the value adjusted at the Isregulator. The output relay R switches into off-position (yellow LED not illuminated) when the measured value for the current falls below the set value by more than the fixed hysteresis.

Input circuit

• Supply voltage:
  • 230 V AC
• Terminals:
  • Li-N
• Tolerance:
  • -15% to +15% of U N
• Rated consumption:
  • 5 VA (0,8 W)
• Rated frequency:
  • AC 48 to 63 Hz
• Duty cycle:
  • 100%
• Reset time:
  • 500 ms
• Wave form:
  • Sinus
• Hold-up time: -
• Drop out voltage:
  • >20% of rated voltage
• Overvoltage category:
  • III (in accordance with IEC 60664-1)
• Rated surge voltage:
  • 4 kV

Functions

Monitoring of phase sequence, phase failure and asymmetry with adjustable asymmetrie, connection of neutral wire optional.

Phase sequence monitoring

When all the phases are connected in the correct sequence and the measured asymmetry is less than the fixed value, the output relay switches into on-position (yellow LED illuminated). When the phase sequence changes, the output relay switches into off-position (yellow LED not illuminated).

Asymmetry monitoring

The output relay R switches into off-position (yellow LED not illuminated) when the asymmetrie exceeds the value set at the ASYM-regulator. Reverse voltages of a consumer (e.g. a motor which continues to run on two phases only) do not effect the disconnection.

Input circuit

• Supply voltage:
  • (= measured voltage)
• Terminals:
  • (N)-L1-L2-L3
• Rated voltage UN:
  • 3(N)~400/230V AC
• Tolerance:
  • -30% to +30% of U N
• Rated consumption:
  • 8 VA (0,8 W)
• Rated frequency:
  • AC 48 to 63 Hz
• Duty cycle:
  • 100%
• Reset time:
  • 500 ms
• Hold-up time: -
• Drop out voltage:
  • >20% of the supply voltage
• Overvoltage category:
  • III (in accordance with IEC 60664-1)
• Rated surge voltage:
  • 4 kV