Variable Speed Controllers - Specfications: Fluid Handling, Heat Transfer and Energy Recovery Systems by EnviroSep

VSC Specifications

Variable Speed Controllers (Variable Frequency Drive Controllers) - Specfications

GENERAL - This Variable Speed Controllers shall be factory assembled per Underwriters Laboratories (UL) Listing 508A. Variable Speed Controller shall have single point line power connection per NEC. Connection shall be provided with interlocking, through-the-door, fused disconnect. Control power shall be provided via on-board fused Control Transformer. Motor circuits shall have Supplementary Circuit Breaker protection. Controls shall be via TFT screen with membrane keyswitch, foundry-duty selector switches and corrosive resistant pilot-lights. Enclosure shall be of Nema 12 construction. Operational testing shall be performed on each Variable Speed Controller prior to shipment. Variable Speed Controller shall be UL-Listed.

GENERAL OPERATION - The system shall provide protection against operation outside of installed safety components. System may be started or stopped by local or remote means. The system shall be inspected and reset locally. When placed in the Auto position, the system shall control using the farthest strayed process variable.

SERVICE DISCONNECT - Shall be IEC style, through-the-door, fused type. Disconnect handle shall meet NEMA requirements for NEMA 1, 12, 4, & 4X conditions. Disconnect shall be capable of lockout. Disconnect shall be capable of at least eight auxiliary contacts to provide more system feedback and control.

CONTROL TRANSFORMER - Standard Industrial Control Transformer shall be limited to 900 inrush VA on 90% secondary voltage at 20% power factor. Control Transformer shall be multi-tap capable. Control Transformer shall be compliant with UL-E61239.

CONTROL VOLTAGE- Shall be customer specified. UL-Listed Control Transformer with fused Primary & Secondary shall be used for 120VAC & 24VAC. UL-Listed Switching Power Supply shall be used for 24VDC.

VARIABLE FREQUENCY DRIVES - Shall have built-in PID control. Drives shall have local keypad operator interface. Shall have RF & EMI filters. Shall be capable of recalling drive adjustments and configuration. Shall display all running parameters. Shall communicate drive identification, parameters, and faults. Shall provide maximum motor efficiency at all times.

SUPPLEMENTARY MOTOR PROTECTION - Shall be Din Rail mountable with internal common trip. Supplementary Motor Protector shall be capable of under-voltage trip, shunt trip, and alarm and auxiliary contacts. Supplementary Motor Protector shall comply with UL-1077 & IEC 947-2.

SELECTOR SWITCHES, PUSHBUTTONS, & PILOT LIGHTS - Shall meet UL-Type 4, 6, & 13 and shall be capable of use in Hazardous locations. All selector switches, pushbuttons, and pilot lights shall be rated at a minimum of 1,000,000 cycles at maximum rated load. All selector switches, pushbuttons, and pilot lights shall be thermally labeled.

PROGRAMMABLE CONTROLLERS - Shall be microprocessor - based. Controller sequence shall be preapproved, programmed and tested at the factory. Remote communications shall vary dependent upon customer requirements. All Programmable Controllers shall be UL-Listed or recognized, and CE and CUL Listed.

TOUCH-PANEL INTERFACE - Shall be capable of multi-pages. Shall be capable of password protection. Shall give access to process variables, alarms, system conditions, & system functionality.

WIRING DIAGRAMS - Shall be included with all UL-Listed Variable Speed Controllers. Diagrams shall be via CAD and follow ISA standards.

LABELING- Shall be thermal adhesion type. Labels shall be custom designed for each Control Panel.

FIELD DEVICES & SWITCHES - Shall be designed for specific location NEMA requirements.

CONSTRUCTION - Shall be performed only by qualified engineers and shall be performed in such a way as to maintain design NEMA rating throughout system.

SYSTEM COMMUNICATIONS – System shall be capable of Profibus, Modbus, DirectNET, DeviceNET, Sysmac, & Ethernet communication protocols for any BAS.

MANUFACTURER - Shall assume system liability, and performance guarantee and warranty all equipment on system for 12 months after initial start-up.

Return to Variable Speed Controllers