Strand System PR Datasheet

The Strand Archive - System PR

Page 1 of 2

System PR Electro-Mechanical Remote Control with Two Presets

This system is available for 60, 72 or 96 individually controlled dimmer channels. Each equipment consists of a remote control
cabinet, a preformed control cable and a dimmer bank with servo-operated variable load resistance dimmers driven by individual
electro-mechanical clutches from a common variable speed motor. Neither of the two dimmer levers to each channel have to
maintain a constant control signal to the dimmer servo and therefore they are available for presetting precise intensity levels two
changes in advance of the lighting in use.

CONTROL CABINET

Cabinets are of sheet metal construction finished hammer blue and grey. All internal wiring is fitted terminating in a testboard
which is also the connection point for the preformed control cable. A floor-standing cabinet is standard but a desk version is
available for an additional charge.

Control Cabinet type PR/72

1. Three-position switch for grouping to Blackout A, or off,
or Blackout B.

2

. Moulded dimmer unit with white scale.

3

. Moulded dimmer unit with green scale.

4

. Three-position switch for grouping the white and green

dimmer levers to the X, Y or Z Move group switches.

5

. Move group switches which when down select the X, Y

and Z groups to change when a master push is pressed.

6

. RAISE push causes selected groups to raise to full

independent of all dimmer levers.

7. *DIM push causes selected groups to fade to zero
independent of all dimmer levers.

8. *WHITE PRESET push causes selected groups to change
to the levels preset on the white dimmer levers.

9. *GREEN PRESET push causes selected groups to
change to the levels preset on the green dimmer levers.

10

. REMAINDER DIM, in conjunction with RAISE or a

PRESET push, causes a cross-fade by fading groups not
selected to zero.

11

. Speed Lever determines the speed, from 3 - 45 seconds,

of all dimming changes.

12

. Indicator Dial shows the rate and progress of all dimming

changes.

13

. Rehearsal Switch allows the WHITE or GREEN

PRESET facilities to be held.

14

. Blackout A, Blackout B and Dead Blackout switches.

*These pushes have a second function against a heavy spring
which extends their effect to all dimmers.

The Strand Archive - System PR

Page 2 of 2

Dimmer Bank type PR/60

DIMMER BANK

The dimmer bank is fitted with a power pack for the
low voltage control circuits and is complete with all
internal wiring and terminals for external
connections to the lighting loads. A nominal 100 ft.
preformed control cable in metallic hose is supplied
to link the dimmer bank and control cabinet. Each
of the channels is provided with an English Electric
H.R.C.Cartridge fuse, a contactor for switching and
a 500/1000 watt or 1000/2000 watt resistance
dimmer. Each dimmer is operated by a pair of
magnetic clutches from a common uni-directional
shaft powered by a variable speed motor. A dimmer
bank cannot be totally enclosed and requires access
on each side.

Type PR/60

Control cabinet and Dimmer Bank for 60 dimmer channels.
Cabinet: 36 (50)-in wide, 16 (30)-in. deep, 72 (50½)-in. high, 240 lb. weight.
Bank: 13-ft. wide, 3-ft. 8-in. deep, 7-ft. 3-in. high, 22 cwt. weight

Type PR/72

Control cabinet and Dimmer Bank for 72 dimmer channels.
Cabinet: 42 (56)-in wide, 16 (30)-in. deep, 72 (50½)-in. high, 270 lb. weight.
Bank: 15-ft. wide, 3-ft. 8-in. deep, 7-ft. 3-in. high, 30 cwt. weight

Type PR/96

Control cabinet and Dimmer Bank for 96 dimmer channels.
Cabinet: 54 (68)-in wide, 16 (30)-in. deep, 72 (50½)-in. high, 336 lb. weight.
Bank: 19-ft. wide, 3-ft. 8-in. deep, 7-ft. 3-in. high, 45 cwt. weight

Variations at Time of Order

Substitution of cabinet in desk form (dimensions in brackets above).
Substitution of 1.5/3kW or 3kW resistance dimmer (dimensions in brackets above).
Substitution of 3/5kW or 5kW resistance dimmer (dimensions in brackets above).
Substitution of 2kW max. transformer dimmer (available in pairs only) (dimensions in brackets above).
Substitution of 5kW max. transformer dimmer (dimensions in brackets above).
Dimmer Bank dimensions above cater for a maximum of four 5kW dimmers.