18TB-2-25 PAYNE ENGINEERING, 18TB-2-25 Datasheet

18TB-2-25

Manufacturer Part Number

18TB-2-25

Description

Variable Transformer

Manufacturer

PAYNE ENGINEERING

Datasheet

1.18TB-1-25.pdf (2 pages)

Specifications of 18TB-2-25

Power Supply Output Type

Variable

No. Of Outputs

Output Voltage

235VAC

Output Current

25A

Power Rating

6kVA

Length

70mm

Width

102mm

Height

152mm

Transformer Mounting

Chassis

Secondary Current Nom

25A

Current Rating

25A

Input Voltage

240VAC

Rohs Compliant

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current page: 1 of 2
Download datasheet (57Kb)

Rt. 29 Scott Depot WV 25560-0070

Model 18TBP/TB controls provide infi-

nitely variable control of single-phase

a.c. voltage to resistive heating ele-

ments. These controls are solid-state

replacements for variable transformers,

mercury relays, saturable core reac-

tors, and electromechanical contactors.

Power Triacs replace contacts and

brushes to control electric power with-

out moving parts, and, when operated

within their stated ratings for current,

voltage, and temperature, have no

known MTBF or life expectancy rating.

Description:Variable-Voltage

Power Control

Product Range:120-240 VAC,

5-25 amps.

Application: R esistance Loads

All Solid-State Construction

Short Circuit Protection

Integral Heatsink Chassis

No Thermal Derating

Replace Variable Transformers

Electric Heater Control

Light Dimming

Hot-Wire Cutting

Heat Sealing and Packaging

Plastic Molding and Extruding

Food Preparation Equipment

TYPICAL APPLICATIONS

Model 18TBP/TB

FEATURES

Model 18TBP controls are compact,

lightweight packages that employ

single hole mounting to panels and

enclosure doors. Model 18TB con-

trols are designed for rear or rack

mounting. Both utilize an electrically

isolated heatsink chassis.

Model 18TBP/TB controls incorpo-

rate exclusive design features to

protect power semiconductor com-

ponents against damage. “2 milli-

second” fuses protect against

short-circuit damage; an R-C snub-

ber network protects against dv/dt

failure; an integral heatsink chassis

allows continuous operation in

ambients to 50

Power Circuit: p ower Triac with par-

allel R-C circuit for dv/dt protection

and current-clamping 2 millisecond

fuse for short-circuit protection.

Control Circuit:R-C network with

variable-resistance potentiometer

adjusts firing capacitor into bilateral

diode connected to power Triac gate

for stable, full-range control.

Mains Frequency: 5 0/60 Hz.

Output Voltage:0-95% of input.

Overall Efficiency: 99%.

Power Loss: approximately 1.5

watts/amp.

Voltage Drop Across Power Circuit

at 100% Output: 1-2 volts maxi-

mum/phase.

Control Input:manual control via

variable potentiometer.

Control Power: 1 watt.

Fuse Protection:2 millisecond I

fuses are factory tested and coordi-

nated with all power semiconduc-

tors, considering:

PANEL- OR CHASSIS-MOUNT

Three Pillars Of Protection

EXCLUSIVE ADVANCED

SPECIFICATIONS

TECHNOLOGY:

C with no derating.

APPLICATION ASSISTANCE - 304/757-7354

Ambient Temperature Range: -10 to

+50

Terminal Connections: B akelite or

thermoplastic blocks.

Model 18TBP/TB controls are rated

for use with constant resistance

loads. Size units by actual load cur-

rent, not kW.

1> Always use maximum possible

load current for sizing purposes.

2> The amp rating is determined by

the fuse. Current draw must not ex-

ceed the fuse rating at any time.

3> Rated voltage of connected load

should match control input voltage.

Application: s ingle-phase, 800 watt

nichrome heating element; input

voltage 120 VAC, 60 Hz.

Model Number Selection:

a. Triac-based variable-voltage: SC

b. Panel-mount: E

c. 120 VAC input: 12

d. Amp rating, calculated as follows:

800 = 6.66 amps

120

Since 6.66<10, amp rating: -10

Model Number:SCE12-10.

PERFORMANCE NOTE: Triac

power circuits may “slave” when

multiple units are used on 240 VAC

lines derived from three phase

mains. For optimum performance,

use on single phase, 240 VAC de-

rived from 3-wire, 120/240 VAC

mains.

WHEN ORDERING, SPECIFY:

SIZING CONSIDERATIONS

a. fuse element melt time t

b. peak melt current I

c. arc quench time t

d. peak arc current I

Model Number

Input Voltage

Load Specifications

SCR Power Controls

SIZING EXAMPLE

24 HOUR FAX - 304/757-7305

Model 18TBP/TB

arc

melt

;

melt

;

Related parts for 18TB-2-25

18TB-2-25 Summary of contents

Page 1

... C. Terminal Connections: B akelite or thermoplastic blocks. SIZING CONSIDERATIONS Model 18TBP/TB controls are rated for use with constant resistance loads. Size units by actual load cur- rent, not kW. 1> Always use maximum possible load current for sizing purposes. 2> The amp rating is determined by the fuse ...

Page 2

... MODEL 18TBP F1 TRIAC POWER CIRCUIT SCHEMATIC All dimensions are approximate, and are not to be used for construction purposes. Payne Engineering Company Inc. reserves the right to make changes to product design, construction, and component parts in the interest of technical advancement without prior notification ...

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