Product at a glance

Automatic demand manager

Maxchek 400 is a smart maximum demand controller with standard size 96×96 mm specifically designed for industries to keep a check on their maximum demand. It gives an alarm when demand approaches a preset value and also switches off non-essential loads in a pre-programmed logical sequence. This predictive maximum demand controller (MDC) allows stage wise load restoration to maximize the use of a sanctioned load. Maxchek 400 is most suitable for the demand control of industrial consumers, HT consumers and commercial establishments. It also support ethernet module for communication.

Application

• Commercial and industrial sanctioned demand monitoring & controlling applications
• Control panels for complete plant demand controlling
• Demand management for commerce and industry

Benefits

• Easy interface with external devices through built-in Modbus (RS-485)
• Detachable connectors for easy installation
• Three relay and one alarm output
• Suitable for star or delta connections and for low or high-voltage applications
• Alarm output for audible indication.
• Field-configurable CT/PT primary and secondary values using push-buttons
• Calibration LED for on-site accuracy check
• Configurable software (ConfigView) for reading of parameters and load survey
• Shift wise demand configuration

Features

• Two modes of programming – preventive mode (only alarm no control), predictive mode (alarm and automatic control)
• Predictive demand control to forewarn, take corrective measures and check maximum demand crossovers
• Multi-level (phase wise and shift wise) priority based automatic load control mechanism to disconnect lowpriority loads in phased manner
• Configurable demand integration period for sliding and fixed type
• Optimised load disconnection time
• Online load planning by continuously indicating loads that can be added or need to be disconnected (within safe operating limits)
• Check meter with accuracy class 0.2s,0.5s and 1.0
• Auto and push button display
• An user friendly software to program and monitor
• Control outputs for alarm and trip applications – it provides 3 control and one alarm outputs, in the form of potential free contacts
• Large four-line seven-digit display (9.7 H x 5 W mm) with quadrant identification section and bar graph for instantaneous power-level indication
• Ethernet gateway module for easy integration

Specification

Electrical

• Connection type : Common product for HT3/ HT4/LT application
• Wiring configuration : Common product for 3 P-3 W and 3 P-4 W application
• .Voltage range :
• Measurement voltage range : 57.7 V(100V) – 240 V (415 V) AC 3 phase 4 wire (3 phase 3 wire)
• Tolerance  : -30% to +20% of Vn
• Aux power supply range : 80 – 300 V AC/DC or 24 – 60 V DC (variant)
• Current range     :  Available 1-2A and 5-10 A in single variant (field configurable)
• Main frequency  : 50/60Hz with ±5%
• Accuracy class  : 0.2s, 0.5s, 1.0
• Burden : Aux burden: 3.5 VA; 8VA with module connected
  Current ckt burden: 1 A – 0.05VA per phase, 5 A – 0.25 VA per phase
  Voltage ckt burden: 0.15 VA per phase
• Energy type : Active Imp (T), Apparent Imp, Active Forwarded, Apparent Forwarded
• Averaging period    : 1min or 5min
• Trip circuit    :     3 Circuit
• Alarm activation time : Active for 30 seconds or active for whole averaging period
• Short time over current  : 20 x I_max for 1 sec., 10 x I_max for 3 sec., 7 x I_max for 10 sec.

Compliance

• Standards*  : IS13779, IS14697, IEC62052-11, IEC62053-23 and IEC62053-22, IEC61010

Mechanical

• Dimensions (WXHXD) : 96 x 96 x 115 mm
  Cut out size 92 x 92 mm
• Weight : 0.5 kg (approx)
• Mechanical enclosure : FRPC
• Terminals  : Combicon connector
• Max conductor size   2.5 mm²