Custom engraved selector switch plates, legend plates, conduit/valve tags, outlet wall plates, recepticle plates, name tags, labels, tags and signs. Standard selector/switch plates: Cutler Hammer, Allen Bradley, Square D, Eaton, G.E. as well as custom sizes and colors. Very reasonable rates. Made Fast, Shipped Fast. 30% off entire order for new customers.
With forty two years experience we provide all aspects of electrical installation and service. Commercial, Residential and Industrial. We are budget friendly offering quality and value. Call us first or last in your decision making process. We offer 24hr emergency servive seven days a week at $150.00 falt rate in Westchester County, NY 914 736-1234 cell 914 382-7273
Westchester County Lic# 1427
Electrician's informational CD w/ spreadsheets for estimating. Uses 2003 or later MS Office or free online clones. Also has free viewers. For info, the CD is on friends website as follows:
Order directly from me and get a free tee shirt. Cost of CD $35 + $3 S & H. CD is for USA, Canada, UK and India
Meade Electric Company provides electricians Phoenix AZ residents and businesses have depended on since 1999 for service panel upgrades, ceiling fan and lighting installations, code violation corrections and short circuit troubleshooting. We schedule 24 hour Phoenix electricians for after-hours electrical repairs too. All work is guaranteed, parts and labor, for 5 years and free estimates are offered weekdays during regular business hours.
Meade Electric Co.
2942 N. 24th St., Suite #114-699
We have a used Transistorized switching module (TSM) just pulled out of a fully functional APC Silcon 40 KVA UPS System in Excellent Condition.
The power switch TSM is designed as 2 individual 3-phase inverters (main & delta inverter) intended for use in DP300E, 3-phase UPS system.
The TSM operates as an electronically controlled low loss power switch, and consists of the following units:
1 Main inverter IGBT *modules V001 - V003
2 Main inverter driver DR02
3 Delta inverter IGBT module V130
4 Delta inverter driver DR01
5 Filter PCB for main & delta inverter FILT
6 Crowbar thyristor V004
7 DC electrolytic capacitors C001 - C004
8. Heat sink and other mechanics
*) IGBT = Insulated gate bipolar transistor
The main inverter consists of 3 identical half bridge IGBT modules V001 - V003 Each of the 3 modules are internally isolated from the heat sink, and each module consists of 2 IGBT's and 2 freewheeling diodes. The PWM output from the 3 IGBT modules is passed through the filter PCB, where a current measurement takes place.
The driver unit, DR02, takes care of the following functions:
A. Gives galvanic isolation (Opto coupler) between control signals and power electronics. (IGBT's)
B. Galvanic isolated power supplies the driver circuits.
C. Supplies IGBT V001 - V003 with control signal. (+/- 15V) for safe turn ON and turn OFF.
D. Protection of the power transistors in case of overload by means of current sensing technique with Hall sensors. (The Hall sensors are placed on the filter PCB)
The delta inverter consists of a six-pack IGBT module V130, which is internally isolated from the heat sink. This module consists of 6 IGBT's and 6 freewheeling diodes and form a complete 3 phase inverter bridge. The PWM output from this module is led directly to the 3 connectors X001 to X003, on the Delta inverter driver DR01.
The delta inverter driver unit, DR01 is mounted directly on the IGBT module V130 and soldered to the terminals. The main functions of DR01 are the same as for DR02, in addition the delta inverter driver contains the following functions:
A. Hall sensors for overload protection and regulation of mains current.
B. Resistors for sensing the 2 DC voltages.
C. Trigger circuit for the crowbar thyristor
D. Output filter capacitors.
E Hall sensors for measuring of the main inverter current.
F. Resistors for sensing of inverter output voltage.
G. DC decoupling capacitors for the main inverter IGBT's.H. Inverter output fuses.
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