Model 18TBP/TB SCR Power Controls Rt. 29 Scott Depot WV 25560-0070 APPLICATION ASSISTANCE - 304/757-7354 24 HOUR FAX - 304/757-7305 PANEL- OR CHASSIS-MOUNT Model 18TBP controls are compact, lightweight packages that employ single hole mounting to panels and enclosure doors. Model 18TB controls are designed for rear or rack mounting. Both utilize an electrically isolated heatsink chassis. EXCLUSIVE ADVANCED TECHNOLOGY: Three Pillars Of Protection Model 18TBP/TB * Description:Variable-Voltage Power Control * Product Range:120-240 VAC, 5-25 amps. * Application:Resistance Loads FEATURES * * * * All Solid-State Construction Short Circuit Protection Integral Heatsink Chassis No Thermal Derating TYPICAL APPLICATIONS * * * * * * * Replace Variable Transformers Electric Heater Control Light Dimming Hot-Wire Cutting Heat Sealing and Packaging Plastic Molding and Extruding Food Preparation Equipment Model 18TBP/TB controls provide infinitely variable control of single-phase a.c. voltage to resistive heating elements. These controls are solid-state replacements for variable transformers, mercury relays, saturable core reactors, and electromechanical contactors. Power Triacs replace contacts and brushes to control electric power without moving parts, and, when operated within their stated ratings for current, voltage, and temperature, have no known MTBF or life expectancy rating. Model 18TBP/TB controls incorporate exclusive design features to protect power semiconductor components against damage. "2 millisecond" fuses protect against short-circuit damage; an R-C snubber network protects against dv/dt failure; an integral heatsink chassis allows continuous operation in ambients to 50oC with no derating. SPECIFICATIONS Power Circuit:power Triac with parallel 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:50/60 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 maximum/phase. Control Input:manual control via variable potentiometer. Control Power:1 watt. Fuse Protection:2 millisecond I2t fuses are factory tested and coordinated with all power semiconductors, considering: a. fuse element melt time tmelt; b. peak melt current Imelt; c. arc quench time tarc; d. peak arc current Iarc. Ambient Temperature Range: -10 to +50oC. Terminal Connections:Bakelite or thermoplastic blocks. SIZING CONSIDERATIONS Model 18TBP/TB controls are rated for use with constant resistance loads. Size units by actual load current, 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 exceed the fuse rating at any time. 3> Rated voltage of connected load should match control input voltage. SIZING EXAMPLE Application:single-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. WHEN ORDERING, SPECIFY: * Model Number * Input Voltage * Load Specifications 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 derived from 3-wire, 120/240 VAC mains. Model 18TBP/TB SCR Power Controls Rt. 29 Scott Depot WV 25560-0070 Model Number APPLICATION ASSISTANCE - 304/757-7354 24 HOUR FAX - 304/757-7305 KVA @ Max. Rated Voltage Max. Amps OPEN CHASSIS DIMEN-SIONS Inches (millimeters) Height Width Depth Fuse Number Single-Phase, 120 VAC, 50/60 Hz Input, 0-118 VAC Output 18TBP-1-5 18TBP-1-10 18TBP-1-15 18TB-1-15 18TB-1-25 5 10 15 15 25 0.6 1.2 1.8 1.8 3.0 49C25-10 49C25-10 49C25-15 49C25-15 49B25-30 3.2 (81) 3.2 (81) 3.2 (81) 4 (102) 6 (152) 2.5 (64) 2.5 (64) 2.5 (64) 4 (102) 4 (102) 2.5 (54) 2.5 (54) 2.5 (54) 2.6 (66) 2.75 (70) 2.5 (64) 2.5 (64) 2.5 (64) 4 (102) 4 (102) 2.5 (54) 2.5 (54) 2.5 (54) 2.6 (66) 2.75 (70) Single-Phase, 208/220/240 VAC Input, 0-206/218/238 VAC Output 18TBP-2-5 18TBP-2-10 18TBP-2-15 18TB-2-15 18TB-2-25 5 10 15 15 25 1.2 2.4 3.6 3.6 6.0 49C25-10 49C25-10 49C25-15 49C25-15 49B25-30 MODEL 18TBP 3.2 (81) 3.2 (81) 3.2 (81) 4 (102) 6 (152) MODEL 18TB WIDTH DEPTH TRIAC POWER CIRCUIT SCHEMATIC HEIGHT F1 OPEN CHASSIS DIMENSION 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. 18TBP/11.2 3/94