Togami Electric Mfg. Co., Ltd.

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Togami Electric Mfg. Co., Ltd.

PRODUCTS

　　
MCC-S

NH-C Type Control Center

NH-C control centers are designed for field use, with a focus on safety, ease of use, and ease of maintenance. Units can be stored with the door closed in all three positions(disconnecting, testing, and connecting).

　　

Features

  • Units can be stored with the door closed in all three positions(disconnecting, testing, and connecting).
  • The main circuit contacts can be easily moved by operating lever. Automatic locking system is equipped with all three positions in order to prevent incomplete connection and disconnection faults.
  • The units employ a mechanical interlocking mechanism which allows them to be inserted or withdrawn from the frame at the disconnecting position only.
  • The protection rating between horizontal and vertical busbars is IP40.
  • Easy connection and maintenance of the horizontal busbars are possible because of the isolated horizontal busbar connecting compartment.
  • Unit replacement is possible without power interruption.

Specifications

　 Wiring types and number of units to insert
Wiring types and number of units to insert
　 Operation with operating lever

【Example：Disconnecting position　→　Testing position　→　Connecting position】

Interlocking mechanism is employed so as not to insert and remove the operating lever at other than three positions.
※ This feature guarantees protection from incomplete connection and disconnection faults either at the supply or load side contacts.
Removing the operating lever will lock each position automatically, and doors can be closed.

Operation with operating lever
　

Dimensions

　 B-B type
B-B
　 B-C・C-B type
B-C・C-B
　 C-C type
C-C
　 Power supply
　　

Please contact us for more details.

About multifunction relays

MFR-D1

MFR-D1

Features

  • Monitors overload, phase loss, ground, overcurrent protection, pre-alarm (overload, ground), MC (magnetic connector), congestion detector, and answer-back signal to detect unintended operation stoppages and greatly improve protective functions.
  • Load current, leaked current, malfunction trip current, malfunction code, settings values, operation history data are displayed on screen. Monitor mode LED and unit display for easy understanding.
  • Select optimal pattern from among 256 sequences. Enables flexible options for diverse external input signals. Able to select settings for reboot after instantaneous power failure, error output, and transmission error operation pattern, enabling diverse sequence control.
  • Models available for standard networks (DeviceNet, CC-Link), and it is possible to build diverse networks for a range of systems, from small-scale to large-scale systems.
  • Input (fixed 3-points, maximum 8 points), output (fixed 2-points, maximum 5 points), analog input/output (1 point each), enabling you to freely select functions for selected input/output. Maximum number of selected input/outputs will change depending on the control method.
  • Includes available power (kW) and available capacity (kWh) measurement function that can be used for energy conservation monitoring.
    ※ In accordance with Measurement Act Article 16, this unit cannot be used on feed-in transactions or distribution.
  • Configured data and history data is saved in nonvolatile memory and is not lost in the event of a long-term power outage.
  • Display panel includes a protective cover to prevent unintended operations.
　
　 Specifications
　
  • Control power supply (standard)
    100 VAC (85 to 132 VAC)
  • Inrush current
    Max. 20 A, not to exceed 3 ms (100 VAC, 50 Hz)
  • Power consumption
    Max. 8 VA (excluding input/output load)
  • Rated frequency
    50/60 Hz (selectable by setting)
  • Insulation resistance
    10 MΩ or more between all electrical circuits and ground
  • Dielectric strength
    2 kVAC for 1minute between live parts and ground
    Excluding communication lines, CT, ZCT, and analog input/output terminals
  • Ambient temperatures
    −10 °C to +55 °C(no freezing)
  • Storage temperatures
    −20 °C to +70 °C(no freezing or condensation)
  • Relative humidity
    20%RH to 90%RH(no condensation)
  • Atmosphere
    No corrosive gas or excessive dust
  • Grounding
    Class D grounding (100 Ω or less)
  • Weight
    Approx. 470 g (MFR-D1-C), approx. 430 g (MFR-D1-D)
  • Allowable duration of instantaneous power failures
    20 ms (operation continues)
  • Noise resistance
    (damped oscillatory noise)
    1 MHz to 1.5 MHz with current corresponding to 95% of set current, damped oscillatory
    voltage with peak voltage of 2.5 kV to 3 kV applied for 2 seconds
    * Control power supply unit, output unit
  • Noise resistance
    (high-frequency noise)
    Rectangular wave impulse noise with peak voltage of 2.0 kV (1 ns/1 μs, 100 ns, 10 minutes)
    * Control power supply unit, I/O unit
  • Electrostatic noise resistance
    (front panel section)
    Metal contacts: ±8 kV　　
    Panel surface (non-metallic contacts): ±15 kV
  • Radio frequency noise
    Frequency bands: 50 MHz/144 MHz/430 MHz,5 W;
    1,200 MHz,1 W
  • Lightning impulse
    4.5 kV (1.2/50 μs) between control power supply and ground
  • Distortion wave resistance
    No malfunction or improper display when 95% of set current is applied, containing 30% fifth harmonic relative to fundamental wave
  • Overload capacity
    Current input unit: 20 times rated secondary current of three-phase auxiliary CT for 2 seconds, twice
  • Input/output connection method
    Connector type Compatible wires: Wire core size AWG 24 to 18, Max. sheath diameter: 3.1 mm
  • Applicable standards
    JEM 1356:1994 Thermal and electronic protective relays for motors
    JEM 1357:1995 Static protective relays for motors
　 Protection Functions

Protection Function Specifications

Item Specifications*
Operating value Operating time
Overload protection (OL) Fixed at 115% of set current value 2 s to 64 s, lock
Phase loss protection (SP) 40%/60%, lock Fixed at 2.0 s
Overcurrent protection (OCI) 110% to 600%, lock 0.2 s to 9.0 s
Undercurrent protection (UC) 30% to 80%, lock 1 s to 9.0 s
Ground fault protection (OCG) 30/100/200/500 mA, lock 0.1/0.3/0.5/1.0 s
Instantaneous power failure
restart relay		 Instantaneous failure compensation time: Lock 0.2/0.5 s to 5.0 s
Delay restart time: 0.0/0.5/1.0 s to 60 s
Instantaneous failure detection time: 0.2 s/0.04 s/non
Power supply pre-alarm 50% to 110% 1 to 15 mins
Ground fault pre-alarm 30% to 60% Fixed at 10 s
Ground fault alarm 15 mA/50 mA Fixed at 10 s

* Each protection function can be locked by setting.
　The reference values for OL, OCI, UC, and OCA are based on the set current value (code 0-2).
　The set current value can be set to between 25% and 100% of the CT primary rated current.


External Serial Interface

Model Upstream interface PC loader interface
MFR-D1-D DeviceNet EIA-ES-422 (standard on all models)
MFR-D1-C CC-Link

Communication protocol manuals are available for each interface.


Measurement and Display Specifications

Item Effective display range Display range and accuracy
Load current (IL) 2.5% to CT rated value to 10 × CT rated value
Maximum phase (R/S/T phase display selectable by setting)		 ±1.5% FS: 0, 2.5 to 125%
± 5% FS: 125 to 1,000%
External analog input (Ai) Analog input 0 V to 10 V is displayed
between the configured lower and upper limits.		 External signal accuracy not included.
±5%FS
Zero-phase current (IG) 10 mA to 500 mA ±5%FS: 0, 10 to 500 mA
Active power/active energy Simplified measurement method
Active power P = √3 × IL × V × pf
Where IL is the load current and voltage V is set
V = 90 V to 480 V (in 2 V increments)		 May differ from actual power (energy) if voltage and current fluctuate significantly.

Operational Control

Control method types

Control method Details
Non-reversing circuit Allows selection of operating sequence from 256 fixed patterns.
Equipped with reversing operation interlock timer
Reversing circuit
Open transition 2Mag Allows precise setting of star operation time, star-delta switching time, and starting resistor protection time.
Open transition 3Mag
Closed transition
Power supply through circuit Functions as a measurement/protection relay without controlling operation.
Mag, Ctt, Ans signals
b contact method		 The control method is determined automatically when the settings are changed.

Operating modes

Operating mode Panel display Effective control location
Direct Direct (DIR) Operational control switches on the panel
Site Remote (REM) External Di/DO signals assigned to the operational control function
Central Remote (REM) Upstream controller

Input/Output Specifications

Input 3 fixed points (forward, stop, 88 Fans) Voltage on/off input 24 VDC, on voltage 15 V or higher
8 selectable points (29 variations). The maximum number of points varies depending on the selected control method.
Output 2 fixed points: ① forward (MCS), ② stop/fault (trip) Maximum switching capacity: 250 VAC,5 A;24 VDC,5 A
Allowable continuous current: 1 A
5 selectable points (18 variations)
The maximum number of points varies depending on the selected control method.
Analog input 1 point (non-isolated), 0 to 10 VDC
Input impedance 10 kΩ or more, allowable input voltage ±40 VDC
Analog output 1 point (isolated), 4 mA to 20 mADC
Allowable load 300 Ω or less, response time 2 s or less

History Data

Operating time , number of forward operations, number of reverse operations, maximum load current, minimum load current,
number of fault operations (external trip count, OL count, SP count, OCI count, etc.), number of pre-alarms, fault history, etc.

　

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