Güral MVHD Series Hand Drive Units offer a robust manual driving solution for almost any applications and climates. MVHD Series Hand Drive Units find widespread application area, including medium voltage networks, DC applications and railway solutions. MVHD Series Hand Drive Units are designed of capability to serve in harsh outdoor conditions, including very cold climates with minimum average temperatures down to -40°C (-32°F) and very hot climates with maximum average temperatures up to 50°C (122°F).

1. Handle The polyamid handle is designed for an easy grasp.
2. Operating Arm The hot deep galvanized operating arm of460mm enables a torque ratio of 1/6,minimizing the effort needed to drive anydevice.
3. Mounting Flange The mounting flange is St 37-2 alloy, and the steel is protected against corrosion by120µm hot deep galvanisation. Connectionis made by 2xM12xL bolts, 2xM12 springwashers and 4xM12 plain washers, as explained on the overall layout drawing.
4. Driving Arm The driving arm is composed of non-corrosive parts, and is compatible with 1"connection pipes or rods. The rotationability in both XZ and XY axises provides MVHD units' assembly flexible and possible on any supports. Please see details below.
5. Position Label The color aluminium label indicates the position of the MVHD and the drived unit.
6. Lock The optional lock provides extra security against unauthorized operations.
7. Release Button The water-proof release button energizes the locking coil to enable manual operation.
8. Casing The casing is made of 2.5mm aluminium, and is electro-static painted.
9. Frontal Cover Assembled by corrosion-proof inox bolts, the aluminium frontal cover is removable for any inside operations by the operator.

1. Thermostat The thermostat is adjustable to maintain the inside temperature between 0 to 30ºC. The default value for the thermostat is 25ºC
2. Core Mechanism The core of the unit is made up of Zn plated steel components and the electromagnetic coil operating at the preferred auxiliary voltage.
3. Auxiliary Switch The auxiliary switch is optional for MVHD units, and can be ordered as from 2 to 8 NO/8NC contacts.
4. Terminal Blocks High quality terminal blocks are tested to comply with IEC 60694 dielectric tests. The quantity of blocks are determined by the electrical component composition of the unit.
5. Heating Resistor The heating resistor is a standart component for MVHD units to assure the proof of corrosion inside the unit and the long endurance of electrical components in harsh environmental conditions.
6. Upper Airway Upper airway lets the moisture and excess heat out, while keeping dust and other unwanted environmental particules away.
7. Lower Airway IP 55 airway to let fresh air in.
8. Lower Cover The lower cover is an electro-static painted aluminium plate and is assembled to the main case by INOX bolts. It can be drilled for cable entry or entirely removed to be replaced by custom covers designed by the user.

Pipe plug-in

1. Pipe Connection The pipe connection is compatible with 1" pipes.
2. Double axis cantilever The rotation ability of the cantilever in both XZ and XY axises provides MVHD units' assembly flexible and possible on any type of supports.
3. Support Connection The M16x75 HDG bolt and the M16 HDG nut connects the driving arm to the operating arm. The driving arm can be dismounted by releasing the connection nut and bolt, in case of any need to ease the pipe connection to the pipe connection component. If needed, the driving arm can also be mounted on the opposite side ofthe operating arm, to inverse the driving direction.

   DK series indoor type hand drive mechanisms are used for operation indoor switchgear such as disconnectors and earthing switches.

There are three types of DK series indoor hand drive mechanisms;

* Normal hand drive mechanism,
* Hand drive mechanism with mechanical locking,
* Hand drive mechanism with electromechanical locking (24, 48,110, 220VDC or 220VAC)

   If required, all types of DK series hand drive mechanisms may be equipped with auxiliary switches 2NO+2NC, 4NO+4NC, 6NO+6NC, 8NO+8NC.

   When lever is in up position disconnector or earthing switch is closed, in down position is open.

   HK series outdoor type hand drive mechanisms are used for operation outdoor switchgear such as disconnectors and earthing switches.

   There is only one type of HK series outdoor hand drive mechanisms with padlocking facility.

   HK series outdoor type hand drive mechanisms can be used together with standard articulatory system.

   When lever is in up position disconnector or earthing switch is closed, in down position is closed.