TEC MODEL 156:
ANALOG SIGNAL ISOLATION
- IEEE 323-1974 Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations
- IEEE 344-1975 Recommended Practice for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations
- 381-1977 – IEEE Standard Criteria for Type Tests of Class 1E Modules Used in Nuclear Power Generating Stations
- IEEE 472-1974 Standard for Surge Withstand Capability
156 IsolatorQualificationSummary
The TEC Model 156 Series Analog Signal Isolators are qualified to meet the requirements of IEEE Standards 323-1974, 344-1975, 381-1977 and 472-1974. The qualification program included baseline functional testing, thermal aging, irradiation aging, seismic testing, and functional testing after each type test.
TEC has performed isolation integrity testing on the Model 156 Isolator. Such testing consisted of the following: (1) Shorts, opens, and 120 V ac at 20 A fault (with input fuses shorted) applied to the non-1E side; and (2) 2000 V dc at 20mA (with input fuses shorted) applied to the non-1E side.
The modules are manufactured by TEC under its Quality Assurance Program in accordance with 10CFR Part 50 Appendix B. If additional information is required on the isolation integrity or qualification of the TEC Model 156 Isolator, copies of pertinent reports are available.
Weight: .78 lbs.
Dimensions: 4.45” L x 2.20” W x 1.175” H
Maximum Common Mode Voltage: 2000V dc pk continuous (inputs to outputs) 2000V rms
Common Mode Input Impedence: 5×1010 Ω| | 20 pF minimum
Case should not be grounded to output side ground potential
Frequency Response (all models): dc-500 Hz minimum (-3 dB)
Input Impedance:
156 A, B, J, K, M, R 10 MΩ ±5%, 1.5 MΩ overload
156 C, N, S, T, U 10 MΩ ±5%, 5.76 MΩ overload
156 D, L 249 Ω ±2%
156 E, G 100 Ω ±2%
156 F, Q 4.99 KΩ ±2%
156 H 102 MΩ ±2%
156 I 10 MΩ ±5%, 8 MΩ overload
156 P 1 MΩ ±10%, 150 KΩ overload
Power Requirements (all models): Voltage +24V dc nominal, +18 to 30
156 Q, R, T: 40 mA current operating max
156 A, B, C, D, E, F, G, H, I, J, K, N, P: 60 mA current operating max
156 L, M, S, U: 90 mA current