Friday, June 26, 2009
Microprocessor-Based SCR Power Controller Designed for Application Flexibility
For over thirty years Watlow® has been manufacturing solid state power controllers. Watlow's new POWER SERIES represents the latest in SCR power controller technology. This microprocessor-based product offers features and application flexibility unmatched by any other SCR power controller on the market today.
Capabilities include single-phase and three-phase models from 65 to 250 amps. Field configurable phase angle or zero-cross firing improves application flexibility on site where you need it. 50/60Hz independent operation means you can operate almost everywhere in the world without special calibration considerations. Serial communications utilizing Modbus® protocol allow for remote control setup, and monitoring of load status from a nearby computer station or control room.
On-board semiconductor fusing improves reliability by protecting the SCRs from heater short circuits. Plus, on-board heater bakeout and control diagnostics can help eliminate initial start up problems. All this in a touch-safe package that can be quickly and easily mounted in your control cabinet.
Agency approvals ensure a product that meets world safety and operational standards.
Microprocessor-based technology Extremely versatile, field configurable
Snap-fit on a pre-mounted plate Easy installation
Models 65 through 250 amp ratings Handles a wide range of loads
Adjustable soft start Application flexibility
Heater and control diagnostics capabilities Monitor actual heater and control performance
Electrically touch-safe package Increased safety for installer and users
Serial comm with Modbus® RTU protocol Computer control and/or monitoring
Multi-zone capability Application flexibility, reduced panel space
Wednesday, June 24, 2009
Fire Shield is a next generation extension cord with built-in intelligence to sense cord damage and shut off the power before a fire can start. No other extension cord has this capability.
Industry statistics indicate there is a cord fire approximately every 6 minutes. The most frequent causes of such fires are short circuits, overloading, damage, and/or misuse of extension cords.
Cords with grounded conductors only provide a path to ground. GFCI’s detect ground faults. Neither detects the breakdown in the insulation of a standard extension cord, which can lead to an arcing condition that may start a fire. By utilizing a sensing shield around the insulated Fire Shield conductors combined with intelligent electronics in the plug head, Fire Shield can detect damage in the cord such as series faults (broken and frayed conductors) and parallel faults (insulation damage between the live conductors), and shut off the power before a fire can start.
Causes of cord fires are unintentional misuse of extension cords. Cords may be crimped, pinched, frayed, overloaded, overheated, or just worn out. Any of these conditions can lead to an extension cord fire. Fire Shield can detect any leakage currents from these conditions and shut off power before a fire can occur.
Fire Shield should be used anywhere you use standard extension cords or power strips; in children’s rooms, pet areas, with space heaters, electric blankets, waterbeds, etc. Children and pets have been known to bite or chew electrical cords. Fire Shield, with its built-in intelligence may provide protection in these circumstances. Fire Shield Safety Extension Cords should also be used during the holidays with Christmas trees and other holiday decorations because of the tendency to overload extension cords.
Standard surge protectors only provide protection against power surges, which is important. However, standard surge protectors do not provide cord fire prevention. TRC has recently introduced a next generation line of Fire Shield Surge Protectors that not only protects against power surges, but also provides cord fire prevention. Please check our website to find the Fire Shield Surge Protector best suited for your requirements.
Many colleges and Universities now require that only the fire Shield cord and strips be used in dorm rooms. Cord fires are the leading cause of fire in dorm rooms. Please review the "Can you Prevent Univertiy Dorm Room Fires" brochure.
Fire Shield products are UL and CSA approved and can be purchased at www.sordselectric.com.
Monday, June 8, 2009
SORDS ELECTRIC sells the Watlow DIN-A-MITE Power Controllers
The Watlow® DIN-A-MITE® Style A power controller provides
a low-cost, highly compact and versatile solid state option
for controlling electric heat. You also get all the quality you
expect from a Watlow designed and manufactured product.
DIN-rail and back panel mounting is standard on every
controller. There is no need to worry about mercury, the
DIN-A-MITE controller is mercury free.
Capabilities include single-phase zero cross switching up
to 25 amperes at 600VÅ(ac) (see rating curve). A unique
integrated design removes the guesswork associated with
selecting a proper heat sink and adequate terminations for
Variable time base, 4-20mA process control or Vı(ac/dc)
input contactor versions are available. All conﬁgurations
are model number dependent and factory selectable. This
power controller also includes 200KA short circuit current
rating (SCCR) tested up to 480VÅ(ac) to prevent arch flash
with required fusing.
The DIN-A-MITE power controller is made in the
Features and Beneﬁts
200KA Short Circuit Current Rating (SCCR)
• Prevents arc ﬂash
DIN-rail or standard panel mount
• Provides versatility, quickness and low-cost
• Reduces panel space; less cost
• Increases safety for installer/user
• Assures environmental safety
Faster switching with solid state
• Saves energy and extends heater life
UL® 508 listed, C-UL® and CE with ﬁlter
• Meets applications requiring agency approval
• Command signal input
• Input indicator light LED
• Single phase, see the output rating curve
• Max. I2t for fusing: 4000A2sec
• Latching current: 200mA
• Holding current: 100mA
• Power dissipation is 1.2 watts per amperes switched
• 200KA SCCR, Type 1 and 2 approved with the recommended
fusing; see user manual.
• 20 to 660V~(ac) model number dependent; see ordering
• Off-state leakage: 1mA at 77°F (25°C) max.
• 50/60Hz independent
Control Mode-Zero Cross
• Input control signal Type C: VÎ(dc) input contactor
• Input control signal Type K: V~(ac) input contactor
• To increase service life on contactor input models, the cycle time
should be less than three seconds
• Input Control Signal Type F: 4 to 20mAÎ(dc) proportional variable
time base control; 3 cycles on, 3 cycles off at 50% power
Input Command Signal
• AC contactor
24VÅ(ac) ±10%, 120VÅ(ac) +10/-25%, 240VÅ(ac) +10/-25% @
25mA max. per controlled leg
• DC Contactor
4.5VÎ to 32VÎ(dc): max. current @ 4.5 VÎ(dc) is 8mA
• Loop powered linear current
4mAÎ to 20mAÎ(dc): loop-powered, input Type F0 option only
(requires current source with 6.2VÎ(dc) available, no more than
three DIN-A-MITE inputs can be connected in series)
• CE with proper ﬁlter:
204/108/EC Electromagnetic Compatibility Directive
EN 61326-1: Industrial Immunity Class A Emissions
2006/95/EC Low Voltage Directive
EN 50178 Safety Requirements
Installation category III, pollution degree 2
• UL® 508 listed and C-UL® File E73741
• Compression: will accept 0.2 to 2 mm2 (24 to 14 AWG) wire
Line and Load Terminals
• Compression: will accept 0.8 to 8.4 mm2 (18 to 8 AWG) wire
• Up to 176°F (80°C); see the output rating curve chart for your
• 0 to 90% RH (relative humidity), non-condensing
• Installation only tested to 3,000 meters
• Units are suitable for “Pollution degree 2”
Options include DIN-rail or standard back panel mounting
• The DIN-rail speciﬁcation is: DIN EN 50022, 35 mm by 7.5 mm
• Mount the cooling ﬁns vertically
• Height: 3.7 in. (95 mm) high x 1.8 in. (45 mm) wide x
3.9 in. (98 mm) deep
• Weight: 0.71 lb (0.32kg)
To order, complete the code number on the right with the
DIN-A-MITE Style A = Solid State Power Controller
DA10 - __ __ __ __ - 0 __ __ __
1 = 1-phase, 1 controlled leg
Cooling and Current Rating
0 = Natural convection current
rating 18A @ 50˚C (see
derating curve for current rating
at other temperatures)
Line and Load Voltage
02 = 24 to 48VÅ(ac)
24 = 100 to 240VÅ(ac)
60 = 277 to 600VÅ(ac)
C0 = 4.5 to 32VÎ(dc) contactor
F0 = 4 to 20mAÎ(dc) proportional
K1 = 22 to 26VÅ(ac) contactor
K2 = 100 to 120VÅ(ac) contactor
K3 = 200 to 240VÅ(ac) contactor
0 = English
1 = German
2 = Spanish
3 = French
Custom Parts Designation
00 = Standard parts
Recommended Semiconductor Fuse and Fuse Holder
Watlow Cooper Bussmann® Ferraz Shawmut
Fuse 17-8025 FWC25A10F L330014
Holder 17-5110 B24202 G81219