Current Sensor SAO CSM SAO DS E 5 3 Solid-state, Plug-in Current Sensor Applicable to motor overcurrent protection and 3-phase AC cur- rent detection. Inverse-type, start-up lock type, and instantaneous type over- current sensors available. Instantaneous type under current sensor available. Plug-in design simplifies installation, removal, and wiring. DIN sized (48 mm x 96 mm) The SAO cannot be used in circuits with waveform distortion, inverter circuits, or with capacitor loads. Model Number Structure Model Number Legend SAO- 12 3 4 5 1. Basic model name 4. Control voltage SAO: Current Sensor 1: 100/110/120 VAC 2. Operating time characteristics 2: 200/220/240 VAC R: Inverse type: inverse time both at starting and during oper- 5: 24 VDC ation 6: 48 VDC Q: Instantaneous type with start-up lock 7: 100/110 VDC S: Regular instantaneous type 5. Product history 3. Detection function N: New version U: Undercurrent detection None: Overcurrent detection Ordering Information Terminal/ Control voltage Overcurrent detection Under current mounting detection Inverse type Instantaneous type Instantaneous type W/start-up lock* W/o start-up lock Plug-in/DIN 100/110/120 VAC SAO-R1N SAO-Q1N SAO-S1N SAO-SU1N rail via socket 200/220/240 VAC SAO-R2N SAO-Q2N SAO-S2N SAO-SU2N 24 VDC SAO-R5N SAO-Q5N SAO-S5N SAO-SU5N 48 VDC SAO-R6N SAO-Q6N SAO-S6N SAO-SU6N 100/110 VDC SAO-R7N SAO-Q7N SAO-S7N SAO-SU7N * Fixed time-limit at start-up, instantaneous thereafter. Accessories (Order Separately) Current Converters Model Current range DIN rail socket SET-3A 1 to 80 A 8PFA1 SET-3B 64 to 160 A Socket Type Model Front connecting socket 8PFA1 1SAO Specifications Ratings Motor circuit Voltage:500 VAC max. 3-phase (primary voltage at SET Current Converter) Current:1 to 80 A or 64 to 160 A 3-phase (primary current at SET Current Converter) Power supply circuit Voltage: 100/110/120 VAC, 200/220/240 VAC, 24, 48 VDC, or 100/110 VDC (leveled DC) +10 Voltage fluctuation: / % max. of the rated voltage 15 Frequency: 50/60 Hz 5% Current SV range See table of Current Converter. Output contact Configuration: SPDT Capacity: 3 A (cos = 1.0)/2 A (cos = 0.4) at 240 VAC 3 A (resistive load)/2 A (L/R = 7 ms) at 24 VDC 0.2 A (resistive load)/0.1 A (L/R = 7 ms) at 110 VDC Power consumption 100/110/120 VAC: approx. 3.5 VA 200/220/240 VAC: approx. 7 VA 24 VDC: approx. 0.3 W 48 VDC: approx. 0.5 W 100/110 VDC: approx. 1.2 W Case color Munsell 5Y7/1 Characteristics Item SAO-R NSAO-Q NSAO-S NSAO-SU N Operating current 100% of the current SV (current when the relay is OFF for the SAO-SU N) Operating time charac- Inverse type Fixed time at start-up and in- Instantaneous type teristics stantaneous thereafter Operating time For a 600% overcurrent: In start-up lock mode with a 0.3 s max. with an overcur- 0.3 s max. when 120% the Time scale x 1: 1 to 10 s 600% overcurrent: rent of 120% the current SV current SV drops below Time scale x 4: 4 to 40 s Time scale x 1: 1 to 10 s 80% Time scale x 4: 4 to 40 s For a 200% overcurrent: 2.8 x t 30%, where t is In instantaneous mode: the operating time at 0.3 s max. at 120% 600% overcurrent. overcurrent (time SV at max.) Initial current in start- --- Approx. 30% of the current --- --- up mode SV Inertial characteristics Will not operate for 80% of op- --- erating time for a 600% over- current. (at min. current and max. time SV) Reset value More than 95% of the operating current Less than 105% of the op- erating current Operating current 10% of the current SV accuracy +10 Operating time / % of maximum time SV (at a time SV: 1) 0.3 s max. 5 accuracy 10% of maximum time SV (at a time SV: 2 to 10) Influence of tempera- 5% for 0 to 40C 10% for 10 to 50C ture on operating current Influence of tempera- 10% for 0 to 40C 20% for 10 to 50C 0.3 s max. for 10 to 50C ture on operating time (start-up mode) Influence of frequency 3% for a frequency fluctuation of 5% on operating current Influence of frequency 5% for a frequency fluctuation of 5% 0.3 s max. for a frequency fluctuation of 5% on operating time (start-up mode) +10 Influence of voltage on 3% for a voltage fluctuation of / % 15 operating current +10 +10 Influence of voltage on 5% for a voltage fluctuation of / % (start-up mode) 0.3 s max. for a voltage fluctuation of / % 15 15 operating time (start-up mode) 2