Monitoring Relays 1-Phase AC/DC Over Current Types DIA01, PIA01 • • • • • • • • AC/DC over current monitoring relay Current measured through internal shunt Measuring range 0.5 to 5 A AC/DC Adjustable current limit on relative scale Adjustable hysteresis Programmable latching at set level Output: 8 A SPDT relay normally de-energized For mounting on DIN-rail in accordance with DIN/EN 50 022 (DIA01) or plug-in module (PIA01) • 22.5 mm Euronorm housing (DIA01) or 36 mm plug-in module (PIA01) • LED indication for relay and power supply ON • Galvanically separated power supply DIA01 PIA01 Product Description DIA01 and PIA01 are precise AC/DC over current monitoring relays. Direct measuring or through current transformer. Owing to the built-in latch function, the ON-position of the relay output can be Ordering Key maintained. The red LED indicates the relay status. Through the built-in shunt it is possible to monitor loads up to 5 A AC/DC. Housing Function Type Item number Output Power supply Range DIA 01 C B23 5A Type Selection Mounting Output Supply: 24 VDC Supply: 24/48 VAC Supply: 115/230 VAC DIN-rail Plug-in SPDT SPDT DIA 01 C 724 5A PIA 01 C 724 5A DIA 01 C B48 5A PIA 01 C B48 5A DIA 01 C B23 5A PIA 01 C B23 5A Input Specifications Input (current level) Measuring ranges Direct Standard CT (examples) TADK2 50 A/5 A TAD2 150 A/5 A TAD6 400 A/5 A TAD12 1000 A/5 A TACO200 6000 A/5 A Contact input DIA01 PIA01 Disabled Enabled Latch disable DIA01: Terminals Y1, Y2 PIA01: Terminals 5, 7 Internal resistance: 0.05 Ω Max. current: 6 A Max. current for 1 s: 25 A AACrms Max. curr. 5 to 50 A 60 A 15 to 150 A 180 A 40 to 400 A 480 A 100 to 1000 A 1200 A 600 to 6000 A 7200 A Terminals Z1, Y1 Terminals 8, 9 > 10 kΩ < 500 Ω > 500 ms Output Specifications Output Rated insulation voltage Contact ratings (AgSnO2) Resistive loads AC 1 DC 12 Small inductive loads AC 15 DC 13 Mechanical life Electrical life SPDT relay 250 VAC µ 8 A @ 250 VAC 5 A @ 24 VDC 2.5 A @ 250 VAC 2.5 A @ 24 VDC ≥ 30 x 106 operations ≥ 105 operations (at 8 A, 250 V, cos ϕ = 1) ≤ 7200 operations/h Operating frequency Dielectric strength ≥ 2 kVAC (rms) Dielectric voltage Rated impulse withstand volt. 4 kV (1.2/50 µs) Note: The input voltage cannot raise over 300 VAC/DC with respect to ground (PIA only) Specifications are subject to change without notice (21.10.00) 1 DIA01, PIA01 Supply Specifications General Specifications Power supply Rated operational voltage through terminals: A1, A2 or A3, A2 (DIA01) 2, 10 or 11, 10 (PIA01) 724: B48: Reaction time Alarm ON delay B23: Dielectric voltage Supply to input Supply to output Input to output Rated operational power AC DC Overvoltage cat. III (IEC 60664, IEC 60038) Alarm OFF delay 24 VDC ± 20%, insulated 24/48 VAC ± 15% 45 to 65 Hz, insulated 115/230 VAC ± 15% 45 to 65 Hz, insulated DC supply AC supply 2 kV 4 kV 4 kV 4 kV 4 kV 4 kV 4 VA 2W Accuracy Temperature drift Repeatability Indication for Power supply ON Output relay ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Housing dimensions DIN-rail version Plug-in version Weight Screw terminals Tightening torque < 100 ms (current rising from -20% to +20% set value) < 300 ms (current decreasing from +20% to -20% set value) (15 min warm-up time) ± 1000 ppm/°C ± 0.5% on full-scale LED, green LED, red (EN 60529) IP 20 3 (DIA01), 2 (PIA01) -20 to 60°C, R.H. < 95% -30 to 80°C, R.H. < 95% 22.5 x 80 x 99.5 mm 36 x 80 x 87 mm Approx. 150 g CE-Marking Max. 0.5 Nm acc. to IEC 60947 Yes connection between terminals Z1, Y1 or 8, 9 is interrupted or the power supply is interrupted as well. Example 2 (Stardard CT) (no connection between terminals Z1, Y1 or 8, 9 - latch function disabled) Mode of Operation DIA01 and PIA01 monitor both AC and DC over current through an internal shunt. They can monitor AC currents up to 6000 A when connected to a suitable current transformer. Example 1 (connection between terminals Z1, Y1 or 8, 9 - latch function enabled) The relay operates when the current flowing through the transformer exceeds the set level. It releases when the current drops min. 4% below the set level (see hysteresis) or when the power supply is interrupted. The relay operates and latches in operating position when the measured value exceeds the set level. Provided that the current has dropped min. 4% below the set point (see hysteresis) the relay releases when the inter- Range Setting Centre knob: Setting of current on relative scale: from 10 to 110% of the full-scale value. 2 Hysteresis: Approx. 4% of set value, it can be extended by inserting a resistor between terminals Z1, Y1 or 8, 9. Approx. resistor values: 10%: 180 kΩ 25%: 47 kΩ 50%: 22 kΩ 75%: 15 kΩ Latch: < 500 Ω Specifications are subject to change without notice (21.10.00) DIA01, PIA01 Operation Diagrams Power supply Power supply Latch ON Set level Set level Hysteresis Hysteresis Relay ON Relay ON Wiring Diagrams Example 1 Example 1 Latch/Hysteresis adjustment Latch/Hysteresis 24 VDC (+) 48/230 VAC 24/115 VAC adjustment 24 VDC (+) 48/230 VAC 24/115 VAC Z1 PE - Y1 ~ + ~ A1 A3 12 9 14 PE ~ I Y2 A2 µ L µ L + ~ 11 8 2 11 4 3 I 7 5 10 1 N (-) N (-) Example 2 Example 2 24 VDC (+) 24 VDC (+) 48/230 VAC 24/115 VAC 48/230 VAC 24/115 VAC Hysteresis Hysteresis adjustment adjustment µ L Z1 ~ ~ Y1 Y2 A1 A3 12 9 I A2 µ L 14 11 N (-) DIA01 Specifications are subject to change without notice (21.10.00) PIA01 ~ 7 ~ 5 8 11 2 4 3 I 10 1 N (-) 3