Siemens 6SE7086-4AH85-1BA0 operating instructions Assembly

01.03 Assembly

2 Assembly

WARNING

The warning notes for "air-cooled units" apply.

Installation and maintenance work relating to the water-equipment is only to be done when the installation is off load.

Temperature shocks caused by cooling water with a different temperature (∆T>10K) are to be avoided! This can occur especially when the unit is switched on (e.g. in the case of low coolant temperature in the re-cooler) or after the temperature sensors have responded in the case of a pump failure. The permissible temperature change in this case is 10 K/min. If this recommendation is not complied with, the life cycle of the unit can be reduced.

In addition, the cooling circuit must be active before load current is supplied (ensured by means of system control). A possible way of suitably adapting the coolant temperature in such cases is to switch on the unit without load current and ensure that the flow rate of the coolant is a slow as possible.

NOTE

The rectifier/regenerative feedback units comprise two partial converters, i.e. the rectifier section (see Fig. 2.1) and the regenerative feedback section (see Fig. 2.2).

The units are components which can only be mounted in cabinets. If there are additional sources of heat in the cabinet (reactors, contactors etc.), sufficient ventilation must be ensured. The units do not need any external cold air. It must be borne in mind, however, that additional heat losses of other components built into the cabinet such as reactors, contactors and so on, cannot be dissipated. The air temperature in the cabinet must not exceed 50 °C. On the C98043-A1695 module, there are terminals (X19, X29) to which fans (230 VAC) can be connected, if necessary, in order to circulate the cabinet air (up to 7 A rated current).

No protection is provided against direct touching (IP00, VBG4). The builder of the installation must ensures this protection by means of suitable devices (covers, cabinet mounting). Bore holes are provided for mounting a protective guard to prevent touching. The guard itself, however, is not included in the scope of supply.

The components which are not mounted on liquid coolers, such as electronics and, in some cases, the power- section fuses, are cooled by means of convective heat exchange.

If the components are mounted in a cabinet, therefore, it must be ensured that discharge air can enter the cabinet. Partitioning provided in units with air cooling interferes with this! Such partitioning must be avoided.

In the case of applications with IP54 degree of protection (or higher), there must be a distance of at least 90mm between the chassis and the top of the cabinet.

2.1Notes on installation and components

A separate circuit which is made of stainless steel and which transfers the heat to a re-cooling system via a water-to-water heat exchanger is recommended for the units.

In order to avoid electro-chemical corrosion and vibration transfer, the units are to be connected to the incoming and outgoing pipes with a flexible, non-conducting hose. The length of the hose should be > 1.5 m.

If the piping of the plant is made of plastic, the hose is not necessary. The water hoses should be connected before installation of the converter.

If hose clamps are used for installation, they must be checked every three months to make sure that they are firmly attached.

Siemens AG 6SE7086-4AH85-1BA0	ENGLISH	2-1
Common rectifier and rectifier/regenerating units with water cooling	Supplement to the operating instructions