USD $20
Bulk Transistors – Bulk Transistors – 2SD2023 NPN, 500 pieces
Stock: 16
USD $5
Bulk Transistors – MCL78L08ACPG, 752 pieces
Stock: 1
USD $20
Bulk Transistors – ML7818FA, Box of 1 000 pieces.
Stock: 1
USD $35
The MTS-1700 Series Universal Protective Relay Test System is a comprehensive relay test system designed for standard testing of polyphase and single-phase protection relays. It can perform steady-state and complex dynamic testing of relays, as well as fault playback (regeneration of digitized fault waveforms). It is meant to be computer controlled, and is particularly designed for simulation of faults in three phase systems. Advanced fault simulation capabilities, such as frequency, voltage, current and phase ramping, are standard. Full control of all functions via the RS-232C computer interface paves the way for automated testing of many types of protection relays.
Working condition unknown.
Stock: 1
USD $85
Electronic Measurements Model TCR 600S1-1 DC Power Supply (600VDC, 1A), working condition unknown.
In the TCR Series, input AC is applied to three pair of bi-directionally connected SCRs placed within the delta connected primary of the main power transformer. The Secondary voltage of this transformer is rectified and double L/C filtered to provide a low ripple DC output. Both output voltage and current are sensed and compared against internal references or externally applied control levels so the supply provides either constant voltage or constant current regulation with automatic crossover depending on control level. Additional circuitry provides bias levels, circuit protection and metering functions.In an SCR phase-controlled DC Power Supply, output is controlled by modulating the conduction angle of the controlled SCRs. In the TCR Series, input AC is applied to three pair of bi-directionally connected SCRs placed within the delta connected primary of the main power transformer. The Secondary voltage of this transformer is rectified and double L/C filtered to provide a low ripple DC output. Both output voltage and current are sensed and compared against internal references or externally applied control levels so the supply provides either constant voltage or constant current regulation with automatic crossover depending on control level. Additional circuitry provides bias levels, circuit protection and metering functions.
Stock: 1
USD $30
TF31165-4 Power Supply Test Fixture, working condition unknown.
Stock: 1
USD $45
Acopian Model R28M13A DC Power Supply (28VDC, 5A). Datasheet available here.
Stock: 2
USD $10
NEW Plastic Electronic Enclosure
Model RM-178
Fits a PCB approximately 16.6″ x 7.6″
Stock: 1
USD $10
NEW Hoffman Q87742427 Control/Junction Box 7.5″ Square
Stock: 5
USD $40
Electronic Measurements Model TCR 80S13 (80VDC 13A), unit has not been tested and is sold “as is”, line cord needs replacing.
Unit is very heavy, and shipping costs will be high as a result.
Stock: 1
USD $40
Power Ten Model 3100A-4006 Power Supply (50VDC, 8A), unit has not been tested and is sold “as is”, requires the line cord to be replaced.
Stock: 1
USD $40
BRS Electronics Power Supply (50VDC, 10A)
Stock: 1
USD $175
Agilent 8960 Series 10 – Wireless Communications Test Set. Working condition unknown, includes original documentation and software. Fantastically heavy and difficult to move (rated as a two-person lift).
Stock: 1
USD $40
RLC Electronics Mode-S
RF Transfer Switch / Relay 97942-1D21923H01
MFR 12598-S-4462
Voltage 25-36VDC
Stock: 6
USD $15
Product data for this line of varistor can be found here. These varistors come in bags of 100 pieces, the following bulk discounts are available:
Stock: 5000
Sphere Research Corporation 
