1-phase power metering direction relay Measures Knob-adjustable power

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1-phase power metering direction relay Measures Knob-adjustable power

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Current Voltage Controls 1-Phase Power Control Type 1821
1-phase power metering direction relay Measures Knob-adjustable power level Built-in adjustable timer function Output: SPDT relay Plug-in type module S-housing LED-indication power supply output power supply
1-phase plug-in power metering relay. Measures power direction mains from power plant generator. Connected other Carlo Gavazzi modules, this relay element avoid wrong transmission power.
Ordering
Housing Type Output Power supply
1821
Type Selection
Plug Circular Output SPDT Supply: 1821 Supply: 1821 Supply: 1821
Input Specifications
Input Pins 0.4-4 max. from current transformer types Transformer Current range(A) 10-100 50-500 10-100 50-500 10-100 50-500 Power range(kW) 26.5 13.2 -132 1.35 -13.5 67.5
Output Specifications (cont.)
Mechanical life Electrical life operations operations max. load) 7200 operations/h kVAC (rms) (cont./elect.) (1.2/50 (cont./elect.) (IEC 60664) Pins VDC, pos. 10-100% average power, provided correct power direction) e.g. 125, Pins pos. Connection with full scale deflection 100% average power causes full scale deflection
Measuring ranges Type Voltage range (VAC) 1821 1821 1821
Operating frequency Dielectric strength Dielectric voltage Rated impulse withstand volt. Voltage output
Output Specifications
Output Rated insulation voltage Contact ratings (AgCdO) Resistive loads Small inductive loads SPDT relay (rms) (cont./elect.) (micro gap) A/250 (2500 A/250 (250 A/25 (250 A/230 A/24
Instrument output Impedance Moving-coil instrument Internal resistance
Specifications subject change without notice (27.10.99)
1821
Supply Specifications
Power supply types Rated operational voltage Through pins Voltage interruption Dielectric voltage Rated impulse withstand volt. 15%, 15%, 15%, kVAC rms) (supply/elect.) (1.2/50 (line/neutral, line/line), direct connection electronics
General Specifications
Delay operate Reaction time Indication Power supply Output Environment Degree protection Pollution degree Operating temperature Storage temperature Weight Approval worst case reaction time LED, green LED, (IEC 60947-1) (IEC 60529) (IEC 60664) -20° +50°C (-4° +122°F) -50° +85°C (-58° +185°F)
Rated operational power
Mode Operation
relay measures average power, maximum same time works power direction relay, whereby relay suitable power measuring with wind driven generators (windmills). relay used with current metering transformers type 500. 1821 measures power supply built-in adjustable delay operate secs. higher metering sensitivity required, metered cable through current metering transformer several times. Example 1821 measures power phase; symmetrical load this representative three phases. When registered average power exceeds power level, relay operates with delay secs. relay releases immediately, when measured average power drops below value minus hysteresis. Example 1821 used with generator connected mains. relay measures average power supplied from generator. value average power read connected instrument. wrong direction instrument displays zero. relay applicable coupling e.g. heating element, order avoid transmission power mains. Step-by-step coupling in/out heating elements possible relays type connected 1821. this connection 178's works power metering relay, current supplied from 1821 proportional average power. Note: connected internally (neutral) must externally connected.
Wiring Diagrams
Example Example
Load
Load
Generator 1821
Power supply
Specifications subject change without notice (27.10.99)
1821
Time/Range Setting
Time setting Upper potentiometer: Delay operate: (tolerance max.: Range setting Lower potentiometer: Level average power scale from 100%. Hysteresis Approx. upper range approx. lower range.
Accessories
Sockets Hold down spring Mounting rack Socket covers Front mounting bezel Current metering transformers Potentiometer lock 100,
further information refer "Current Metering Transformers" "Accessories".
Operation Diagrams
Example Example
Power supply value Hysteresis Effective power Relay
Power supply value Hysteresis Effective power Relay
Specifications subject change without notice (27.10.99)

1-phase power metering direction relay Measures Knob-adjustable power

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