ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L917TX_1.0.Sch
100V DiVA A80 Power Transformer
Contact Engineer:
L917TX
17-Apr-2003
INITIALS
Printed:
1
1
Sheet
of
Notes:
Contact Tel:
(01223) 203 200
Travis Pierce
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
BLUE
BLACK
ORANGE
GREEN
PRIMARY
SECONDARY
+
6800uF
TEST CIRCUIT
Load
+Vout
-Vout
PRIMARIES
BLACK
GREY
BLUE
GREEN/YELLOW
B: 125mm max
SCREEN WIRE
Transformer Specification for 100V 50/60Hz mains transformer (for audio).
Arcam Part Number L917TX.
To standards BS415 / EN60065 / Class I / EN60742 / UL506.
All solid copper leadout wires to be insulated and colour coded with UL
PVC105°C sleeving.
Material Safety Specification
---------------------------------------------------
1. Winding Wire to be Grade 2 (130°C rating) to BS 60317-4 1995.
2. Mylar Polyester Insulator Rated to 130°C.
Electrical Specification
---------------------------------------------------
3. Transformer to have dual 100V primaries to allow parallel operation with 100V
input.
4. Transformer input voltage range as follows:
100V -15% +15% (85V to 115V)
5. Transformer to have 2 high-power secondary windings as shown in the
adjacent drawing.
6. Loaded DC voltages specified at 100V AC in (with transformer primaries in
parallel).
7. Centre-tapped secondary windings to have a full wave (4 diode) bridge to
produce dual polarity DC rails; high power winding output voltage to comply with
test specifications given (see Test Circuit and Test Specifications at right).
8. Windings to be evenly spaced with minmal gaps; magnetic radiation should be
minimised.
9. Max core flux density 1.5T at nominal rating (referred to M4 core material; see
14 below).
10. Core must not saturate at 20% over nominal primary voltage.
11. Temperature rise to be less than 60°C at 30% duty cycle (referred to 100V
input voltage and On-Load current).
Mechanical Specification
---------------------------------------------------
12. Primary wires self-ended and individually sleeved, then sleeved together.
Secondary wires self-ended and individually sleeved. Low power secondary
centre tap to share common sleeve. Use PVC sleeving.
13. Primary/Secondary leadout separation to be minimised.
14. Product is for hi-fi audio; hum must be minimised.
15. All wire lengths are +20, -0 mm. All wires stripped 8 +/-2mm and tinned.
A
: 5
5m
m
m
ax
LEADS EXIT NEAR TOP
HIGH POWER SECONDARIES
120MM
140MM
Interwinding Screen
+
6800uF
100V ac
100V ac
BLUE
GREY
BLACK + WHITE
DRAWING NOT TO SCALE
TOP VIEW
Trough Voltage
+Vout
OUTPUT WAVEFORM
0V (Black + White)
Peak Voltage
63V
63V
GBU8D 8A 200V
TEST SPECIFICATIONS
Input Voltage (parallel primaries)
100V
115V
Max Off-Load Peak Voltage
Min On-Load Trough Voltage
41 +1.5/-0 V
On-Load Current
100mA
6.0A
Off-Load Current
-
-
6.0A
63V
-
TGP
17 April 03
1.0
17Vac @ 100mA*
17Vac @ 100mA*
ORANGE
BLUE
ORANGE
WHITE
(Approximate Test Circuit DC output voltage with ripple)
3.2Vac @ 55mA*
WHITE
WHITE
* - wire diameter at least 0.4mm
(may have 5mm 'bulge' for leadouts & sleeves)
3.2Vac WINDING
330MM
230MM
17Vac WINDINGS
PRODUCTION RELEASE
160MM
03_E118
